Serial Port Driver (?) VISA related error

[stsat]

Hi, I have an executable that uses the serial port to connect to an instrument but also GPIB to connect to other intsruments and I am facing the following annoying issue: 

I have installed NI-VISA, 488.2 and NI-MAX but also Runtime engine in the deployment machine.  GPIB works fine in all cases. But serial port is not working (note that serial ports works via a terminal like PuTTY). When I try to check it via NI-MAX the open test panel returns an error "error opening resource ASRL1::INSTR Labview: (HEX 0xBFFF009E) Visa or code library" which typically means that some driver is missing. Then I moved to repair of NI-VISA which completes with an 1603 error 

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000000P9c0SAC&l=en-GR

When I restart the machine the serial port works OK. I can see that both in my executable application but also in NI-MAX "open test panel" which works fine and I can send commands.

If the machine is left turned on then the port is working. If I make a restart (or shutdown) then the serial port is not working (!) and it is needed to make a repair again and then after restart works again!. 

I found also another way to make it work without enabling the repair process: I make a "reset configuration settings" in NI-MAX and then after a forced restart the serial port works again!

Any suggestions or ideas ?

BR, Stelios, Greece

[psuedonym]

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@stsat wrote:

Hi, I have an executable that uses the serial port to connect to an instrument but also GPIB to connect to other intsruments and I am facing the following annoying issue: 

I have installed NI-VISA, 488.2 and NI-MAX but also Runtime engine in the deployment machine.  GPIB works fine in all cases. But serial port is not working (note that serial ports works via a terminal like PuTTY). When I try to check it via NI-MAX the open test panel returns an error "error opening resource ASRL1::INSTR Labview: (HEX 0xBFFF009E) Visa or code library" which typically means that some driver is missing. Then I moved to repair of NI-VISA which completes with an 1603 error 

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z000000P9c0SAC&l=en-GR

When I restart the machine the serial port works OK. I can see that both in my executable application but also in NI-MAX "open test panel" which works fine and I can send commands.

If the machine is left turned on then the port is working. If I make a restart (or shutdown) then the serial port is not working (!) and it is needed to make a repair again and then after restart works again!. 

I found also another way to make it work without enabling the repair process: I make a "reset configuration settings" in NI-MAX and then after a forced restart the serial port works again!

Any suggestions or ideas ?

BR, Stelios, Greece

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That error usually means another application most likely Putty has not released COM1 because Putty is still open.

[stsat]

Hi, thank you for your response but the problem appears when I restart the machine without using PuTTY. 

I am trying to solve this by various means, it is strange and annoying....

[psuedonym]

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@stsat wrote:

Hi, thank you for your response but the problem appears when I restart the machine without using PuTTY. 

I am trying to solve this by various means, it is strange and annoying....

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That's not what you wrote in your first post. When I restart the machine the serial port works OK

[stsat]

Hi again, thank you for your time.

It is a really strange issue. Please check what I was mentioned above:

"When I restart the machine the serial port works OK. I can see that both in my executable application but also in NI-MAX "open test panel" which works fine and I can send commands.

If the machine is left turned on then the port is working. If I make a restart (or shutdown) then the serial port is not working (!) and it is needed to make a repair again and then after restart works again!. 

I found also another way to make it work without enabling the repair process: I make a "reset configuration settings" in NI-MAX and then after a forced restart the serial port works again!"

I am not sure if it is a NI or WIndows issue. I am working on setting another machine using older versions of NI-VISA, 488.2 and Runtime. The executable was made on Labview 2017 and I am using the latest versions of all the above. I am pretty sure that will not solve the issue. 

Thanks again,

Stelios

[psuedonym]

Again, you are making contradictory statements.  It makes NO sense.

How is restarting and make a restart  different ????????

[stsat]

I work for a company, another colleague has the same issue. 

I am describing what is happening which is very strange but is a true problem.    

Only a video session would help to see that this actually happens!. If needed I can do it. 

BR,

Stelios