Question:
Using EHX v9.1 or later
In my project which has a number of linked frames, when I create a new fixed group i noticed that the global fixed group number has been duplicated as that same number is being used on another frame. This is stopping the system from downloading
Answer:
The Duplicate Global Group number problem appears to be caused by having multiple stacked maps in the matrix configuration manager screen. When EHX creates a new group we check the global group numbers in all the LOCAL (stacked) configurations and make sure the new group number is not in use in any of the local configuration for that particular matrix. We also check to see if the local (internal) group number already exists in the stacked configs. If it does we use the global group number associated with that number. This is to facilitate switching between stacked configs.
However we do not check if the new global group number is being used by any other matrix in the linked set, including the current local config. The problem is similar if a map is imported to a matrix but not made the active map

This is now fixed in EHX v10

Solution update Sep 6, 2022
EHX system recommendation: for all versions of EHX

When merging maps from different matrices or when using global numbers for groups and Partylines in a multi frame setup
For multi-framed systems we recommend that you use a numbering scheme where each matrix is given a range of global numbers for Groups and Partylines.

Note: the terms Groups also covers fixed groups, sort groups , antennas groups and other groups , these should all have a unique number across your linked set of matrices