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I have been getting an "ToExpression::sntxi: Incomplete expression; more input is needed" error when trying to Install[] a new WSTP program I've written. It's entirely possible that there is some problem with the WSTP program, but this error doesn't give me a clue what it might be. I haven't even called the program yet, merely tried to Install[] it. Is there a WSTP or Install[] guru who might be able to suggest the circumstances under which running Install[] can produce such an odd error? For the record, a WSTP program does end up running, though unusable as it has returned only $Failed to the kernel.

Other WSTP programs install and run just fine.

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The MathLink template file has Mathematica code in it. Almost certainly your template file has code with syntax errors. "Incomplete expression" indicates that you may have forgotten to close a bracket.

If you can't find the error, please post the template file.

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  • $\begingroup$ I will look into this when I get to the office, but your suggestion surprises me -- I compile my .tm file into C++ and include it in my build. Does Mathematica code survive that process? $\endgroup$
    – Michael Stern
    Commented Aug 31, 2016 at 10:11
  • $\begingroup$ @MichaelStern Yes. You can check in the produced C file. It is partly this Mathematica code that sets up definitions when Install is run. It is also allowed to put arbitrary M code in the .tm file, which will be run on Install[]. $\endgroup$
    – Szabolcs
    Commented Aug 31, 2016 at 10:42
  • $\begingroup$ I found several potential problems in the template, the proximate one almost certainly being a missing quotation mark. Thanks a million for this answer. $\endgroup$
    – Michael Stern
    Commented Aug 31, 2016 at 14:19

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