Dynamics AX unpack type mismatch

I had this strange problem where in when a form loaded it gave an error on the unpack method stating type mismatch. The code was find and was not able to find any issues with it until i realized that i had done a xpo import recently which means the pack was done on the previous version and now the system was trying an unpack on a new version after the import.

in this new version there was a new parameter added which was not packed thus i had to clear the cached data and the issue was resolved.

The cached data could be cleared using the link
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