hserout issues on the 18F26K83

[tumbleweed]

...Single letter/digits commands (like '?' works most of the time, multi letter/digit commands (like 'P100' works sometimes but most often not.

This could be due to your code and how the two terminals work. MCS will send the data when you click 'send', or when you hit 'Enter' if you have the transmit window setting 'Transmit on carriage return' checked.

For TeraTerm, this is configurable (char vs line mode), but typically it's set to transmit as the individual chars are entered.