Hello,
I ghosted a test machine to Windows 2000 and installed NI-IMAQ 2.5.4 and a PCI-1424. Dalsa SI-11-01K25.icd file loaded up fine with no problems and then I upgraded to version 2.5.5 and camera file still loaded up fine. I'm assuming that you are getting the invalid camera file error right when you load up the file. I can't do further testing because I don't have access to the camera.
This may be due to a corrupted upgrade installation. In order to verify this, install the NI-IMAQ driver on a different computer and try your camera file there. Once that works you can uninstall and reinstall NI-IMAQ on your original machine.
I hope this helps! Let me know if you have further questions regarding this.
Regards,
Yusuf C.
Applications Engineering
Nationa
l Instruments