Image may be NSFW.
Clik here to view.
This error has been coming up lately in version GP2010. The solution has been to rename the Forms.dic. So, you need to export any modified forms to a package file. Rename your Forms dictionary and then import the package file, thereby creating a new Forms dictionary.
While I have only seen the forms dictionary needing to be renamed, start with renaming both the forms and reports dictionaries and then add them back one at a time. Or, just export all of your modifications, rename all of the forms and reports dictionaries and then import everything back in.
Microsoft has acknowledged this is an issue, but has not determined the exact reason.
Until next post!
Leslie