Jump to content
OMRON Forums

How to fix "FT_GetComPortNumber returned bogus port numner -1" error

Recommended Posts

When starting the LVS-95XX software, the error "FT_GetComPortNumber returned bogus port numner -1" can appear (see screenshot below):

User-added image

This can happen sometimes seemingly inexplicably, but often during new installs and always when starting the LVS-95XX software. It is caused by another device connected to the PC that uses an FTDI chipset like our LVS-9570 barcode verifier. When the software is started, our FTDI driver detects the other device and assumes it an LVS-9570, but when it attempts to communicate with the device it does not receive the expected response.

Currently, the solution is simply to disconnect the problem device prior to starting the LVS-95XX software to avoid the conflict.


Software Version


Operating System


Link to comment
Share on other sites

  • Replies 0
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Top Posters In This Topic

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...