I'm working on a project with an 18F252.
Last week or so, the programm was able to write to the EEPROM.

f.e.:
PWM_LCD CON 10

GIE=0:WRITE PWM_LCD,1:GIE=1


But since a few days, it doens't work anymore.

Now I've checked all configuration-bits, but there is no problem, because writing to the eeprom couldn't be inhibited by configuration...

Is there any know (hardware or software) possibility to make this ?

I've used several PICs, and all have the same problem...