I have just revisited some old code which was compiled with the C51 C compiler - the code compiles ok (flow is C51->BL51->OH51). I now need to add some inline assembler. To check that the new flow (C51->A51->BL51->OH51) is ok before I make the changes, I directed the compiler to write a .src file. The assembler detects errors in the .src file - "ERROR #10.... ATTEMPT TO DEFINE AN ALREADY DEFINED SYMBOL". Any ideas?