> Hello, I'm using PIC16F876 with PCM (from CCS) C-Compiler.
> I put the Prescaler from the timer 0 to the Watch Dog because timer 0
> is lead externally and has to be incremented at each falling edge. I
> put NOWDT on the configuration bits. in spite of those elements the
> PIC resets because of the WDt.

I've used NOWDT in CCS with the F876 and it works fine.  So:

- most programming software allows you to manually change the settings
  of the configuration bits.  Did the watchdog inadvertently get turned
  on that way?
- Are you sure it's a watchdog reset?  How do you know?
- are you using an emulator?  With the ICE2000, for example, you change
  the watchdog stuff via menu options - the settings in the hex file
  don't have any effect.

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