Henrik,

Thanks for your help. I not tried exaktly this (i have no LCD)

I tried this:

MR var word: H var byte

for H=0 to 15
MR.0[H]=1 'set bit H of MR
next H

This works fine in PicBasic but when compiling in PicBasicPro this bits never are set. Other things in my code (about 8k) works perfect. I have only problems when adressing bits form words or bytes

Maybe I have a library instalation problem?