Problem witn MikroC global variables usign PIC16F877

[KHDAK]

Hi, I declared my global variables as "static" but during program execution the variable contents are over written by other functions, specially when LCD is used. My RAM utilization is below 50% and no variable overflows. I am checking the output on PROTEUS ISIS. I have used WINAVR and CodeVision before and I never experience such problem. Please help me with this issue, Is there a compiler settings that can cause this issue?

 

[BradtheRad]

Questions:

Do you use any commands that alter memory contents directly?

Do you use a variable to store graphics in a form that might extend beyond its DIMensioned memory, with the chance it could overwrite a neighboring variable?

Does your byte addressing scheme constrain itself to particular boundaries (specifically even memory values)?

And (pardon if this question is redundant), does your programming language interpret 'STATIC' variables as global when they are declared outside any function?