1 Continuous MCPWM at a time

[HenrikOlsson]

Almost impossible to say although noise on the MCLR pin or supply lines are likely causes. There's a register, I believe it's called RCON (check the datasheet), which you can check to see what caused the reset. There will be various bits set depending on if it was a brown-out reset etc - that might help.

Make sure you have sufficient decoupling as close to the supply pins as possible and make sure you coonect ALL the supply pins - not just one pair.

/Henrik.

[Jumper]

Add some capacitors to the MCLR. Maybe 0.1 uF and 2.2uF and hopefully you can still program the pic. If you have a long trace on the pcb to the programming connector you can also try to add the capacitors close to the connector since that trace will act like an antenna.