Hi

I need some help. I'm using Keil uV2, C Programming. I want to store the value that is in port 1 to R4 of registerbank 1. I have no problem calling the registerbank using the code #pragma RB(1), but as soon as I select R4, keil gives me a compiler error. What am I doing wrong? This is what I have:

#pragma RB(1)
R4 = P1;

Please help!