Error Messages/42754
Error message
You cannot set the Original attribute of Va3 to point to Generation_capacity because Generation_capacity is browse-only.
Cause
Your model has a module (either the model itself, or a linked sub-module) that is browse-only, which means its contents, other than variables with input nodes, cannot be changed. If you were able to set the Original attribute of an input node to point to a browse-only object, you would be converting a browse-only object into one that can be altered. This is disallowed, since browse-only means you aren't supposed to be able to change it.
Remedy
You should request a change to the browse-only module from whoever provided you with it. That person should have the "master" version, which he can edit. If it is appropriate to give this node an input, he can do that and provide you with a new revision of the module.
See Also
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