Excel 2013 Power Pivot RemoteApp - limited by 4 concurrent users?

Question

We're trying to use Excel 2013 (64bit) + Power Pivot via RemoteApp. The problem we're having is basically the same as described this TechNet thread. 4 concurrent users have no problem using Power Pivot, the 5th person gets this error: "Couldn't load the data model. This may be because the data model in this work map is damaged".

Any idea?

EDIT: Got an answer in the TechNet thread, that 32-bit office helped. Will try that and post results here.

Answer 1

I can confirm that using 32-bit Excel indeed solves the issue. No idea why the problem with the 64-bit version though.