I created an new alternate member hierarchy yesterday comprised almost entirely of shared members. Before saving my changes, I clicked the big Verify button at the bottom of the EAS window and was immediately greeted with Error(1260052) – Syntax error in input MDX query on line 5 at token ‘@MEMBER’ BustedMemberNameHere.
Google provided very little insight; every single hit on the first 3 pages of results were either in reference to syntax errors at run time or were wholly irrelevant.
Playing with the MDX code quickly verified that the validation was puking on one of the new shared member names, and this in spite of the code making a very clear reference to the correct tuple.
On a hunch, and having a good backup of the outline, I went ahead and saved my changes. Following the save, I clicked the Verify button again – and this time, it verified without a hitch. Moreover, and as I suspected would be the case, follow-up testing shows the MDX code to be executing as expected.