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code working in proteus and not on real hardware

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ep.hobbyiest

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I have doubt that code working in proteus but not on real hardware.
But few days back code was worked on hardware too.
then what may be the problem.
 

ep.hobbyiest

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i was run usb stack from microchip and 18f4550 pic.
XC8 compiler.
Is there possibility to damage pin?
 

nagkiller

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Maybe is missing PullUp resistor to VCC on MCLR pin or error in fuses!!!

Send code and schematic!!!
 

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