Troubleshooting
Problem
This technote identifies a possible resolution to the error, An internal error has occurred, Error Number: -2147221075, Error Description: Class not registered, which might occur when creating a Microsoft® Access based project in IBM® Rational® RequisitePro®.
Cause
The full error message is as follows:
An internal error has occurred:
Error Number: -2147221075
Error Description: Class not registered
This issue is commonly the result of a corrupted installation of the Microsoft Data Access Components (MDAC) on the local system.
Resolving The Problem
To resolve this issue you must install the latest version of MDAC:
- Log on to the computer as an Administrator.
- Close out of all programs, including anti-virus software.
- Download the appropriate version of MDAC from Microsoft and install it.
- Reboot the machine.
NOTE: Microsoft does not recommend that a version of MDAC be "rolled back" (downgraded) to a previous version. This can create instability in the operating system itself, as well as cause previously installed programs not to function.
Refer to the following Microsoft Articles for more information regarding MDAC:
301202: How to check MDAC Version
307255: Component Checker: Diagnose problems and reconfigure MDAC installations
232060: Troubleshooting guide for MDAC setup issues
Historical Number
151353477
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Document Information
More support for:
Rational RequisitePro
Software version:
2003.06.00, 2003.06.13, 2003.06.14, 2003.06.15, 2003.06.16, 7.0, 7.0.0.1, 7.0.1
Operating system(s):
Windows
Document number:
328597
Modified date:
16 June 2018
UID
swg21131765