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Tips and Tricks for Avoiding the Error 20534 in Crystal Reports



<h1>Error 20534: Error Detected by Database DLL in Crystal Reports</h1>


<p>If you are using Crystal Reports with Visual Basic 6.0, you may encounter the error 20534: Error detected by database DLL when you try to run or preview a report. This error can be frustrating and confusing, especially if the report works fine on your development machine but not on a clean machine. In this article, we will explain what causes this error and how to fix it.</p>




Error 20534.error Detected By Database Dll Crystal Reports



<h2>What is Error 20534?</h2>


<p>Error 20534 is a generic error message that Crystal Reports displays when it cannot access the database that the report is based on. The database DLL is a file that Crystal Reports uses to communicate with the database. There are different types of database DLLs depending on the database you are using, such as P2BDDAO.DLL for DAO, P2CTDAO.DLL for ODBC, P2IRDAO.DLL for RDO, etc.</p>


<p>When Crystal Reports tries to run or preview a report, it needs to log on to the database using the database DLL. If the database DLL is missing, corrupted, or incompatible with the database, Crystal Reports will fail to log on and display the error 20534.</p>


<h2>What Causes Error 20534?</h2>


<p>There are several possible reasons why you may get error 20534 when using Crystal Reports with VB6. Some of the common causes are:</p>


<ul>


<li>The database has moved or changed and the report is not updated with the new location or structure. You need to verify the database in Crystal Reports and resave the report.</li>


<li>The database DLL is not registered or installed properly on the target machine. You need to make sure that the correct database DLL is included in your installation package and registered on the target machine.</li>


<li>The database DLL is incompatible with the database or the version of Crystal Reports you are using. You need to check that the database DLL matches the database type and version that you are using.</li>


<li>The report is corrupted or contains invalid objects or code that cause errors in Crystal Reports. You need to check and fix any errors in your report design or code.</li>


</ul>


<h2>How to Fix Error 20534?</h2>


<p>To fix error 20534, you need to identify and resolve the cause of the error. Depending on the cause, you may need to do one or more of the following steps:</p>


<ol>


<li>Verify and update the database in Crystal Reports. Open the report in Crystal Reports and go to Database Verify Database. If there are any changes in the database, Crystal Reports will prompt you to update them. Save the report after verifying.</li>


<li>Include and register the database DLL in your installation package. Make sure that you include the correct database DLL for your database type and version in your installation package. Also make sure that you register the database DLL on the target machine using regsvr32.exe or other methods.</li>


<li>Use a compatible version of Crystal Reports and database DLL. Check that the version of Crystal Reports and database DLL that you are using are compatible with each other and with your database. If not, you may need to upgrade or downgrade your Crystal Reports or database DLL.</li>


<li>Check and fix any errors in your report design or code. Open your report in Crystal Reports and check for any errors or warnings in your report design or code. Fix any errors or warnings that may cause problems in Crystal Reports.</li>


</ol>


<p>By following these steps, you should be able to fix error 20534 and run your reports successfully.</p>


<h3>Conclusion</h3>


<p>Error 20534 is a common error that occurs when Crystal Reports cannot access the database that the report is based on. The error can be caused by various reasons such as database changes, missing or corrupted database DLLs, incompatible versions of Crystal Reports or database DLLs, or errors in report design or code. To fix error 20534, you need to identify and resolve the cause of the error by verifying and updating the database, including and registering the database DLL, using a compatible version of Crystal Reports and database DLL, or checking and fixing any errors in your report design or code.</p>


<h4>How to Troubleshoot Error 20534?</h4>


<p>If you encounter error 20534 when using Crystal Reports with VB6, you can use some troubleshooting techniques to find and fix the problem. Here are some steps you can follow:</p>


<ol>


<li>Check the error message and the report code. The error message may give you some clues about the cause of the error. For example, if the error message says \"Error in File C:\\temp\\report.rpt: Error detected by database DLL\", it means that there is a problem with the report file or the database DLL. You can also check the report code and see if there are any errors or warnings in your VB code or Crystal Reports formula editor.</li>


<li>Test the report on your development machine. If the report works fine on your development machine but not on a clean machine, it means that there is a difference between the two machines that causes the error. You can compare the database location, database DLL version, Crystal Reports version, and other settings between the two machines and see if there are any discrepancies.</li>


<li>Test the report with a different database. If the report works fine with a different database but not with your original database, it means that there is a problem with your database or the database DLL. You can try to use a different database type or version and see if that solves the problem.</li>


<li>Test the report with a different version of Crystal Reports. If the report works fine with a different version of Crystal Reports but not with your original version, it means that there is a compatibility issue between your Crystal Reports version and your database or database DLL. You can try to use a newer or older version of Crystal Reports and see if that solves the problem.</li>


</ol>


<p>By following these troubleshooting steps, you should be able to narrow down and fix error 20534 when using Crystal Reports with VB6.</p>


<h5>Summary</h5>


<p>Error 20534 is a common error that occurs when Crystal Reports cannot access the database that the report is based on. The error can be caused by various reasons such as database changes, missing or corrupted database DLLs, incompatible versions of Crystal Reports or database DLLs, or errors in report design or code. To fix error 20534, you need to identify and resolve the cause of the error by verifying and updating the database, including and registering the database DLL, using a compatible version of Crystal Reports and database DLL, checking and fixing any errors in your report design or code, or troubleshooting the problem using some techniques.</p>


<h6>How to Prevent Error 20534?</h6>


<p>Error 20534 can be prevented by following some best practices when using Crystal Reports with VB6. Here are some tips you can use to avoid this error:</p>


<ul>


<li>Use the latest version of Crystal Reports and database DLL that are compatible with your database and VB6. This will ensure that you have the most updated and bug-free features and functions.</li>


<li>Use a reliable and stable database that does not change frequently or unexpectedly. This will prevent any mismatch or inconsistency between the report and the database.</li>


<li>Use a proper connection method and logon information for your database. This will ensure that Crystal Reports can access the database securely and smoothly.</li>


<li>Design and code your report carefully and correctly. This will prevent any errors or warnings in your report that may cause problems in Crystal Reports.</li>


<li>Test and debug your report thoroughly before deploying it. This will help you identify and fix any errors or issues in your report before they cause problems on the target machine.</li>


</ul>


<p>By following these tips, you should be able to prevent error 20534 and use Crystal Reports with VB6 successfully.</p>


<h7>Final Words</h7>


<p>Error 20534 is a common error that occurs when Crystal Reports cannot access the database that the report is based on. The error can be fixed by identifying and resolving the cause of the error, such as database changes, missing or corrupted database DLLs, incompatible versions of Crystal Reports or database DLLs, or errors in report design or code. The error can also be prevented by following some best practices when using Crystal Reports with VB6, such as using the latest version of Crystal Reports and database DLL, using a reliable and stable database, using a proper connection method and logon information, designing and coding your report carefully and correctly, and testing and debugging your report thoroughly before deploying it. By following these steps, you should be able to use Crystal Reports with VB6 without any problems.</p>


<h8>How to Learn More About Error 20534?</h8>


<p>If you want to learn more about error 20534 and how to use Crystal Reports with VB6, you can use some online resources that provide useful information and guidance. Here are some of the online resources you can use:</p>


<ul>


<li>The SAP Community is a platform where you can ask questions, share knowledge, and get answers from experts and peers on various topics related to SAP products and services, including Crystal Reports. You can search for existing questions and answers on error 20534 or post your own question and get help from the community. You can also browse through blogs, articles, tutorials, and videos that cover various aspects of Crystal Reports and VB6.</li>


<li>The Tek-Tips Forums is a website where you can join intelligent work forums for computer professionals and discuss various topics related to programming languages, databases, operating systems, software applications, hardware devices, and more. You can find a forum dedicated to Visual Basic (Classic) where you can ask questions, share tips, and get solutions on error 20534 or any other issues related to Crystal Reports and VB6.</li>


<li>The Experts Exchange is a website where you can get answers from experts on various technology topics, including Crystal Reports and VB6. You can search for existing solutions on error 20534 or post your own question and get help from experts. You can also access articles, videos, courses, and webinars that cover various topics related to Crystal Reports and VB6.</li>


</ul>


<p>By using these online resources, you should be able to learn more about error 20534 and how to use Crystal Reports with VB6 effectively.</p>


<h9>Conclusion</h9>


<p>In this article, we have discussed error 20534, a common error that occurs when Crystal Reports cannot access the database that the report is based on. We have explained what causes this error and how to fix it by verifying and updating the database, including and registering the database DLL, using a compatible version of Crystal Reports and database DLL, checking and fixing any errors in your report design or code, or troubleshooting the problem using some techniques. We have also provided some tips on how to prevent this error by using the latest version of Crystal Reports and database DLL, using a reliable and stable database, using a proper connection method and logon information, designing and coding your report carefully and correctly, and testing and debugging your report thoroughly before deploying it. Finally, we have suggested some online resources where you can learn more about error 20534 and how to use Crystal Reports with VB6 successfully.</p>


<p>We hope that this article has been helpful and informative for you. If you have any questions or feedback, please feel free to leave a comment below.</p>


<h9>Conclusion</h9>" and ends with "please feel free to leave a comment below." Here is the conclusion again:


<h9>Conclusion</h9>


<p>In this article, we have discussed error 20534, a common error that occurs when Crystal Reports cannot access the database that the report is based on. We have explained what causes this error and how to fix it by verifying and updating the database, including and registering the database DLL, using a compatible version of Crystal Reports and database DLL, checking and fixing any errors in your report design or code, or troubleshooting the problem using some techniques. We have also provided some tips on how to prevent this error by using the latest version of Crystal Reports and database DLL, using a reliable and stable database, using a proper connection method and logon information, designing and coding your report carefully and correctly, and testing and debugging your report thoroughly before deploying it. Finally, we have suggested some online resources where you can learn more about error 20534 and how to use Crystal Reports with VB6 successfully.</p>


<p>We hope that this article has been helpful and informative for you. If you have any questions or feedback, please feel free to leave a comment below.</p> ca3e7ad8fd


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