Hi, Acrylon,
Upgrading doesn't fix past errors that already exist in data. Often we tweak the DIC in new releases and, therefore, after the upgrade, DIC may be able to detect and possibly fix errors that existed before. Make sure you have a backup and run DIC in all 3 modules.
Upgrading will prevent errors from occurring moving forward from the upgrade if the errors were caused by a program problem we were able to duplicate and fix.
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Regards,
Softrak Tech Support