Hello! I have a problem and need a help! I use the macro XVAR for a bus communication. I have defined: #define name XVAR(unsigned char, 0x100000) name= 0x10; In the START167.A66 File this address is defined for Chip select1 (CS1) When I run the debugger I get the error 65, access violation What did I wrong? Sorry if this is a stupid question! I'm a beginner! Thank you very much for your help!