| Applies To: |
|
| Summary: |
| When I try to connect to the Citect OPC
server from a 3rd party OPC client, I get an error like:
CoCreateInstance: Class not registered or... COM/OPC error
0x8007007E on CoCreateInstance() Error string: The specified module
could not be found.
Additional: Could not connect to server 'Citect.OPC' |
| Solution: |
| These errors can occur if Citect 5.20 or
5.21 is installed in one directory and another copy or version is
installed in a different directory. When Citect is installed, it
registers COM objects that it uses with its OPC server and for Tag
Import / Export / Linking. After that, these features will no
longer work for the other installations of Citect since the objects
will be registered to the latest Citect installation directory
only. If the copy of Citect that you want to use OPC or Tag
Import features with does not work, the easiest way to fix this is
to re-install that copy of Citect. This will re-register the
objects to that Citect directory. If you cannot do that, or
that did not fix it, you can manually correct the path in the
registry settings using Windows RegEdit.exe.
Fix all of these keys that exist in your registry (some may not exist): HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{28B9E8A1-8E26-11d1-9326-00802963D3A4}\InprocServer32 (Default) = C:\CIT520\Bin\MSDAOSP.DLL HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{41972D01-8B14-11d1-931B-00802963D3A4}\InprocServer32 (Default) = C:\CIT520\Bin\ciascdrv.dll HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{44F924F1-C367-11d1-A0CB-00805F35F8B0}\InprocServer32 (Default) = C:\CIT520\Bin\cidbfdrv.dll HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{44F924F2-C367-11d1-A0CB-00805F35F8B0}\InprocServer32 (Default) = C:\CIT520\Bin\MSDAOSP.DLL HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{4EE39DA1-0CB6-11d2-8A20-00802963D3A4}\InprocServer32 (Default) = C:\CIT520\Bin\cimitsubishidrv.dll HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{4EE39DA2-0CB6-11d2-8A20-00802963D3A4}\InprocServer32 (Default) = C:\CIT520\Bin\MSDAOSP.DLL HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{BA198B61-32E3-11d1-A1B5-00805F35623C}\InprocServer32 (Default) = C:\CIT520\Bin\CtOpc32.dll HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{BA198B61-32E3-11d1-A1B5-00805F35623C}\LocalServer32 (Default) = C:\CIT520\Bin\CTOPC32.EXE HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{dfc8bdc0-e378-11d0-9b30-0080c7e9fe95}\InprocServer32 (Default) = C:\CIT520\Bin\msdaosp.dll HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{E455B364-67AE-11d1-92E9-00802963D3A4}\InprocServer32 (Default) = C:\CIT520\Bin\citrans.dll HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FDB66A50-3E35-11d2-AEF2-00805F031A5E}\InprocServer32 (Default) = C:\CIT520\Bin\ciopcdrv.dll HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{FDB66A51-3E35-11d2-AEF2-00805F031A5E}\InprocServer32 (Default) = C:\CIT520\Bin\MSDAOSP.DLL |
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