PUSH_VALSPEC DST stack machine operator for variable 'symbol_name'
 is not yet implemented

    Facility: DEBUG, VMS Debugger

    Explanation: The named variable's address is complex, and its
    computation uses operands which live in different places at
    different points in the program's execution. This cannot be
    denoted using DEBUG Symbol Table (DST) features which this
    version of the debugger supports.

    User Action: Verify that you are using the latest releases of the
    compiler and debugger. Try recompiling the application without
    optimization. Examine the nearest object code which references
    the variable and simulate the access algorithm by hand.