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xc8-cc --chip=16F877A main.c --mode=pro The compiler internally calls Xclm.exe Xc8 71 to validate the PRO license. If the license is missing, you receive the error. In corporate environments with floating licenses, code 71 can signal that all seats are in use or that the license server is unreachable. How to Diagnose and Fix Xclm.exe Xc8 71 Errors If you are encountering this error, follow this systematic troubleshooting guide: Step 1: Verify Your XC8 License Status Open a command prompt (Admin mode on Windows) and navigate to the XC8 bin directory:
But in current forums and support tickets, most frequently appears as a specific error context when the license manager fails to activate the PRO features. Common Scenarios Where You See Xclm.exe Xc8 71 1. Build Errors in MPLAB X IDE You might see an output like: Xclm.exe Xc8 71
cd C:\Program Files\Microchip\xc8\v2.40\bin xclm -status Look for output that clearly states “PRO” or “Free”. If you see “No valid license found,” you likely have error 71. If you have a purchased PRO license: xc8-cc --chip=16F877A main