A poorly repacked version may read your radio correctly but write corrupted data. This can "brick" your GM338, turning it into an expensive paperweight. Recovery requires a special jig and a clean EEPROM flash.
A repack version of the software is a modified or re-packaged version that may include additional features or fixes. When downloading a repack version, make sure to verify its authenticity and safety. motorola gm338 programming software free repack
Before hunting for a free repack, you must understand what you are looking for. The GM338 uses the (often labeled as "CPS R06.xx.xx" or similar). A poorly repacked version may read your radio