Problem with PIC18F2550 (may be BSR)

[rprata]

I am using PIC18F2550 and CCS PCH C compiler 3.221.

I have variables in ram (in position 0x24,0x25, ...), and I never affect these variables with value 0, but sometimes the variables have these value.

I also use the interrupt from Timer3, and the follwing functions:
write_eeprom (...)
read_eeprom(...)
read_program_eeprom(...)


For me the problem may be BSR but I check and don't see any error.

I don't no ... I need help