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RMAT tool does not open with error message The ConnectionString property has not been initialized

Issue
User tries to Run RMAT tool on Power Monitoring Expert 8.1 after upgrading however the tool displays message
"The ConnectionString property has not been initialized" 

Product
RMAT 5.0

Environment
Power Monitoring Expert (PME) 8.1

Resolution
*Warning: Take backups of any files prior to modifying them. Ensure the backups are in a location that will not be overwritten (i.e. the Desktop).*

1) Navigate to where the RMAT tool is installed. Default location is C:\Program Files(x86)\Schneider Electric\RMAT.
2) Open the file Report Measurement Admin Tool.exe.config in a text editor such as notepad.
3) Search for the string "AvailableIONVersions" 
4) In the Value tag add 8.1; to the front of the list

ex
<value>8.0;7.2.2;7.2.1;7.2;7.0.1;7.0</value>
Updated to 
<value>8.1;8.0;7.2.2;7.2.1;7.2;7.0.1;7.0</value>

5) Save the changes and open the RMAT tool
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