Content originally posted in LPCWare by lpcxpresso-support on Mon Nov 03 21:30:26 MST 2014
The error 'No Source Available for "0x1fff0938"' means that the program has stopped, hit a breakpoint or encountered a fault and the PC location is 0x1ff0938. As that address is in the on-chip ROM, this address does not map to any source in your application.
You will need to debug your application (from Reset) to find out how it gets there. If you code is NEVER run (i.e. you get this error before you have started your code), then the most likely cause is that you have the ISP pin floating, or tied the wrong way. Check your ISP/Reset circuit.