PIC18F25K20 is resetting when MCLR is floating (MCLRE = OFF)

[npelov]

Hi,
 
I have basic PIC18F25K20 circuit using 12 MHz oscillator and debug output like this:
 
  while(1){
    NOP();
    LATBbits.LATB5 = 1;
    NOP();
    LATBbits.LATB5 = 0;
  }
 
The chip is resetting every few ms. When I connect MCLR pin to Vdd (it's 5V) it stops resetting. MCLR is disabled using:
#pragma config MCLRE = OFF // disable reset from MCLR 
 
To be sure I read the device and these are the config words (from config1 to config7):
0600
1410
0C00
0001
C00F
E00F
400F
 
config3 bit 15 is 0
 
Watch dog and Brown-out Reset are disabled.
 
I guess a software instruction could reset the chip, but it stops resetting when I pull up MCLR to Vdd. Also if I pull down MCLR it is held in reset - like if it was enabled. The program is pretty simple. Interrupts are disabled. I can't think of a reason why the chip should reset. I checked errata - nothing there about MCLR. Any ideas?
 

[jucole]

hi,  your CONFIG 4  "0001" seems like you have the debugger enabled could it be that?

[npelov]

Well it is that
I thought I covered that by setting "RELEASE" build in ide few times - I use this code:
#ifdef __DEBUG
#pragma config DEBUG = ON
#else
#pragma config DEBUG = OFF
#endif

However I guess I did something wrong - probably didn't run complete rebuild. Now I did and it's working fine. I guess I should do complete clean/rebuild when I switch build configuration.

[dannyf]

I guess I should do complete clean/rebuild

Or finding a minimalist piece of your code that exhibits the issue and post all of it.

A big part of getting helped is to make it easier for others to help you.

[npelov]

You are right. I should have posted more/full code. But the problem is fixed.

[jucole]

Well it is that

cool! ;-)