QB Issue Resolution:

FIXED – So this was a problem for me all day.

 

It started as the H202 error and not being able to get into multi-user mode, but then I was getting errors on QB File Doctor saying *QBDBMgrN was not running on this computer”.  I tried a clean install of qbmanager, manually adding firewall ports, resetting the firewall settings to default, multiple restarts, etc.

 

After several hours of my own trouble-shooting about an hour and a half with support, we tried renaming the *.QBW.TLG and the *.QBW.ND with .old (so QB would create new files) files and it not only fixed the problem but greatly sped up QB itself. 

 

If you’ve tried all the help articles it might be helpful to take note of the size of the .tlg and .nd files.  I was told if they are too large it could create errors.

 

For reference, my tlg file was about 1.04GB and my file size itself was 1.9GB

Resolution for Issue 'Errors Hosting Multi-User Mode' available: Yes (Solved).
Source: Intuit Community forum.

Errors Hosting Multi-User Mode: this issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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