Serial ports not appearing in MAX - VISA installed.
Hi All,
Had a rather strange issue today that I couldn't resolve with serial ports not appearing in MAX (and hence being inaccessible to LabVIEW). Under the windows device manager it shows 4 COM ports and I have verified with an external program that they are functioning correctly.
I had the LabVIEW 2011 SP1 f2 runtime installed, DAQmx 9.6.1 and NI-VISA 5.3 (5.2 also didn't work).
Things I have tried:
- Updating VISA from 5.2 to 5.3
- Reinstalling the COM port devices under device manager
- Changing the COM port numbers
- Verifying that the COM ports are functioning correctly
- Tried adding a USB to Serial converter as a new COM port
- Reinstalling MAX
- Reinstalling NI-VISA
- Reinstalling everything (reboot each time when prompted)
- Resetting the hardware configuration from within MAX
- Run installers / MAX as administrator (this is running from the local admin account)
- Checked that NI-VISA appears under software in MAX
- Repaired MAX/NI-VISA
Is there anything else that could cause the COM ports not to appear in MAX when they appear (and work correctly) in device manager when a reinstall of NI VISA / MAX won't solve?
Certified LabVIEW Architect, Certified TestStand Developer
NI Days (and A&DF): 2010, 2011, 2013, 2014
NI Week: 2012, 2014
Knowledgeable in all things Giant Tetris and WebSockets
Solved!
Go to Solution.
I found the solution - it turns out that the serial ports were available to LabVIEW, they just didn't show up in MAX because installing just the runtime does not show the devices in MAX.
Despite doing a lot of googling earlier, it didn't throw up this knowledgebase article until I searched for it under a different phrase - http://digital.ni.com/public.nsf/allkb/766FD80DAE42E52886256A0200619CFE?OpenDocument
Certified LabVIEW Architect, Certified TestStand Developer
NI Days (and A&DF): 2010, 2011, 2013, 2014
NI Week: 2012, 2014
Knowledgeable in all things Giant Tetris and WebSockets
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Thankyou for the responce, I have tried ( and tried ) to get this to work without success so far. I downloaded NI visa301full.exe and followed the instructions regarding the batch.bat file however when I finally got the visa install popup to appear it progresses to the progress bar window, the progress bar fills to about 30% for 1 of 16 then removes the progress, waits a few seconds then part fill the progress bar again, and repeats over and over till I cancel. After some reading I noticed the batch file is only needed for multiple exe install so I removed the batch file and have been trying to call the visa301full.exe directly to make things simpler.
I tried manually installing the visa301full.exe and this worked fine, so at least I can see my application and visa301full.exe working together when they are installed. Ive attached my build file as hopefully Ive done something daft there. I think its probably nearly there, I appreciate your help and advice.
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On my machine I can access all Serial ports perfectly. I put a Vias Resource in my VI and get a drop down menu with all my serial ports. But on other machines (Runtime v7 and VISA runtime installed) I don´t get the names (e.g. com1 com2) but only
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When you run MAX it is configuring your VISA alias list behinf the scenes. See "JB" answer to this question to find out how to do this without using MAX. It basicly requires editing an INI file.
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package my.ate.pkg;
import javax.swing.*;
import java.util.*;
public class PingTest extends javax.swing.JFrame implements javax.comm.SerialPortEventListener{
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initComponents();
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