Motorola Solutions ASTRO 25 Portable CPS (Customer Programming Software) Version Referenced: ENLN4115 (Specifically revisions associated with R20.x and newer) Focus: Resolution of "Download Failed" and "Flash Code Update" errors during firmware upgrades.

The fix replaces the older, generic USB Serial drivers with a specific Motorola-signed driver set that treats the APX radio as a distinct class of hardware during the boot process.

: Frequently caused by incompatible or loose programming cables .