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Title
-42 UNSUPPORTED: "ERROR: BLANK FEATURE" Seen When Trying to Checkout License

Summary

-42 UNSUPPORTED: "ERROR: BLANK FEATURE" Seen When Trying to Checkout License

Symptoms

Whilst checking out a license from a license server the following error message may be seen:
16:51:45 (flynn) UNSUPPORTED: "ERROR: BLANK FEATURE" (PORT_AT_HOST_PLUS ) sflynn@CHLTFLYNN (Invalid parameter. (-42,540:10054 ""))

Cause

This issue occurs if a blank feature is passed through to the lc_checkout function call in the Flex Enabled application. To easily reproduce the error you can add the following code snippet to the lmflex.exe sample that is supplied in the toolkit:
if(lc_checkout(lm_job, "", "1.0", nlic, LM_CO_NOWAIT, &code, LM_DUP_NONE))
{
lc_perror(lm_job, "checkout failed");
cleanup(initHandle);
exit (lc_get_errno(lm_job));
}
As can be seen above, the feature name is represented by the "". This passes no feature name through to the function and hence the error message.

Resolution

To resolve this issue, please ensure that there is always a value being passed to the lc_checkout function for the feature name variable.
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-42 UNSUPPORTED: "ERROR: BLANK FEATURE" Seen When Trying to Checkout License