R,
First, does the "Compare Project Versions" toolbar show in the Toolbars
of your Global? If it does, when you activate the toolbar does the
actual toolbar appear in the Project window? If it does, when you hit
the "Compare Project Versions" icon on the toolbar does the active
project "flicker" as if something is happening? If the answer to the
first two is "yes" but the answer to the third is "no", do you have a
project file open? If "yes", you might try re-loading the add-in.
The Project Compare add-in creates a separate Project file that displays
differences between the two files based on what options are selected in
the userform that appears shortly after the compare icon is selected.
Comparison is accomplished by using the Unique ID as an index. Therefore
it will not compare consolidated (i.e. master file with inserted
subprojects) and it will not compare files that are not direct
"descendents" of each other (e.g. if the later version file was saved as
a database and then re-opened the Unique IDs will reset). You should
also be aware that the add-in will hit a runtime error if the file view
table has field duplicates (e.g. Cost field shows up twice).
Generally the add-in is a very flexible and versatile utility.
Hope this helps.
John
