Cannot call subVI without errors-- but fine as standard VI

[Boilermaker10]

Hello all,

I have a VI that works perfectly fine when run independently of anything else, but when called from another VI (which I rather need to do) it chokes, and I get a VISA command error (as in, it returns an error saying there's a problem with the command sent to the program).  To be perfectly clear, it's getting the _exact_ same input manually and via the super-VI. 

I'm a little confused both as to how this is possible and what to do about it.  I've tried clearing the VISA buffers in question before calling this VI, to no avail, and am not sure I can close and reopen without causing other problems.  Does anyone have any ideas?

[crossrulz]

Let's see some code.  Otherwise it is a complete shot in the dark.

[Boilermaker10]

Gladly.  Should I attach the code as files, or should I screenshot?

[crossrulz]

We recommend posting the VIs.  If you have more than one (sounds like you should) then zip up the files and post the zip file.

[JÞB]

If its simple inline snippets.  these let everyone see what you've got and we can dig into the code with a few drags n drops.   otherwise attach .vi's or a zip of the whole project.

[Boilermaker10]

This has some irrelevant files buried further in the .zip.  The two most relevant are in the first level (e.g. immediately on unzipping)-- I can run 'setpoint' on its own, but if I try to run 'readout_combined', setpoint is where it breaks.

[JÞB]

I have no Idea why you would send a selected device clear.  This would be a problem the Lakshore resets when you raise DC1

[Boilermaker10]

I'm sorry, I don't understand what you mean.  What's DC1?

EDIT: Based on your suggestion, I deleted the clear block (which made sense as I chased down an earlier error), and suddenly it works perfectly.  Still don't understand why though.

[JÞB]

For GPIB devices CLR send s "Selected Device Clear"  Which, in this case, is also a reset command for the device (you can tell from the utility device reset)

DC1 is one of the handshake lines on the GPIB bus it is  not too surprising that it is involved with Device Clear commands.

[Boilermaker10]

I did not know that.  No wonder it was causing problems!

Thank you!