If you are running a web application that uses the Crystal Reports Runtime (e.g., an ASP.NET app), ensure the application pool is enabled for 32-bit applications:
Also, the runtime version of Crystal Reports must match the calling application’s bitness. For web servers, install the SAP Crystal Reports Runtime engine for .NET (32-bit).
Open the problem report in Crystal Reports Designer. Look for any formula fields with names like Barcode128, GenerateQRCode, or check the Formula Workshop → Report Custom Functions. If you see a function named u25idautomation or IDAutomation_*, you have your answer.
Alternatively, open File → Report Options and uncheck “Verify on Open” temporarily. If the report opens but fails on refresh, the DLL is needed only when data is processed.
Since u25idautomation.dll is third-party, errors typically arise from missing, unregistered, or incompatible versions.
| Error Message | Likely Cause | Solution |
|---------------|----------------|----------|
| "Unable to load u25idautomation.dll" | DLL not found or path not accessible. | Reinstall IDAutomation barcode software. Ensure the DLL is in a folder accessible to the Crystal Reports runtime (e.g., C:\Windows\System32 for 32-bit apps, or registered via regsvr32). |
| "The UFL 'u25idautomation.dll' could not be loaded" | Crystal Reports cannot register the UFL. | Run regsvr32 "full\path\to\u25idautomation.dll" as Administrator. Check bitness: 32-bit Crystal needs 32-bit DLL. |
| "Barcode not displaying" | Formula missing or function name changed. | Verify the correct function name (e.g., IDAutomation.Code128 vs IDAutomation_Code128). Check that the data passed to the function is not null. |
| "Access Violation" | DLL conflict or corrupted installation. | Reinstall the barcode software. Install latest Visual C++ runtimes. |
Search for u25idautomation.dll in the following locations:
If missing, reinstall the IDAutomation Native Barcode Generator for Crystal Reports.
If the DLL exists but Crystal Reports still fails, the application pool or user account may not have permission to read/execute the DLL.
For IIS (web applications):
For Windows Desktop Apps: