In SX Microcontrollers, SX/B Compiler and SX-Key Tool, JonnyMac wrote:

I don't think the long wires are the problem (I built a similar programming adapter with a "dip-clip") -- what you should have, though, is a 0.1uf cap between the Vdd (2) and Vss pins (4) on the chip and, most importantly, a 10k pullup between the /MCLR (28) pin an Vdd.

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