programming and debugging issue

[xyzabcpqr]

hELLO ALL,

I am using PIC16F1937 , MPLAB IDE V8.7 as a software platform tool and MPLAB ICD 3 as a programmer/ debugger.
I am facing some strange problem .

When I program my board and using MPLAB ICD3 programming supply, it works good. but when I remove programming connector and apply external supply it does not work. and even when I reconnect programming connector to provide supply, then again it does not work and i have to program it again to get it working.

And in Debugging, it gives this error:
Programming...
The following memory regions failed to program correctly:
Configuration MemoryAddress: 00008007 Expected Value: 000009a4 Received Value: 00000000
Programming failed

I have some confusion related to the MCLR pin connection and its software setting.
Can anyone help me to resolve that issue?

 

[jayanth.devarayanadurga]

You have to pullup MCLR pin high using a 10K resistor.

 

[keith1200rs]

I believe it has an internal MCLR pullup in the IC.

Have to switched to a "release" version of the code to program it and also switched to using the ICD3 as a "programmer" not "debugger" in MPLAB?

Have you enabled the MCLR pin in the configuration word or not?

Keith