Error Description:
ModMain: Main error 50003 error line 20, unexpected error
Resolution:
This error indicates that the system environment is having a problem loading the interface. To correct the issue, it will be necessary to apply the VB Runtime Redistributable appropriate to your operating system.
Please contact Microsoft for assistance with locating the proper update file. Once the VB Runtime Redistributable has been run, reboot the system. You will need to reinstall the WISC-IV Integrated Writer or run the program repair prior to using the program.