topic Re: Need Solution for Sub VI Missing in LabVIEW

Need Solution for Sub VI Missing

dcs-santhosh — Sat, 23 Sep 2017 07:28:55 GMT

Hi all,

I am new to this Labview environment, Could you please help me to solve the issue am facing in labview program. Recently i got a sample application code when i open this file i got some errors like

Poly VI 'MB Serial Master Query (Poly).vi': Sub VI is missing

Sub VI 'ADO Connection Create.vi': Sub VI is missing

Further i am not able to run the program, Please guide me to solve the problem. I don't know this issue may be a small one but am not able to give a correct solution.

Awaiting for your valuable feedback.

Regards,

Santhoshkumar.

Re: Need Solution for Sub VI Missing

JensG69 — Mon, 24 Mar 2025 19:38:12 GMT

For Modbus you are probably missing this library: https://forums.ni.com/t5/Reference-Design-Content/LabVIEW-Modbus-API/ta-p/3524019

Regards, Jens

Re: Need Solution for Sub VI Missing

wiebe@CARYA — Mon, 24 Mar 2025 19:38:36 GMT

The ADO vi is from a database toolkit. Probably NI's database connectivity toolkit.

Re: Need Solution for Sub VI Missing

dcs-santhosh — Sat, 23 Sep 2017 10:40:25 GMT

Already installed this library even though this error might occur. Is there any alternate solution to solve the problem?

Re: Need Solution for Sub VI Missing

wiebe@CARYA — Sat, 23 Sep 2017 10:56:03 GMT

If you are sure it's installed (and where), LabVIEW might look for the files in the wrong place. When lv searches for the vi's, press the browse button and navigate to the vi manually. You might need to repeat this a few times. When all files are located, and the project is saved, next time you should not have to do it again.

Another option might be that the original programmer made these vi's and store them in the libraries. That means they are simply lost... It's unlikely though, most of us don't bother making polymorphic vi's for one time use.

Re: Need Solution for Sub VI Missing

Aliaksei.Luferau — Mon, 24 Mar 2025 19:40:16 GMT

About Modbus. You should download this library https://forums.ni.com/t5/Reference-Design-Content/LabVIEW-Modbus-API/ta-p/3524019 (download link https://download.ni.com/pub/gdc/epd/nimodbus121.zip)

It contains a "NI Modbus.llb" library that contains poly VI 'MB Serial Master Query (Poly).vi' and others.

Re: Need Solution for Sub VI Missing

YangZH — Fri, 14 Jul 2023 10:06:53 GMT

Thank you very much for the File sharing. It helped me fixed the issue just now.