Helmut and Mike,
Many thanks for your help. I moved the Spice directive ".lib
opamp.sub" to the top level as suggested, and the sim ran. It
seems
rather awkward to have to remember to put all hierarchical
subcircuit calls at the top level when constructing a hierarchical
schematic, but I guess there's no way around it. (Is there?)
Hello Ron,
a few minutes ago I sent Mike Engelhardt this question and asked him
to answer into this thread at the YAHOO-LTSpice group.
Best Regards
Helmut
