Excel 365 Memory Issue solved
I have a fairly large spreadsheet with associated macros. It normally occupies about 300MB in memory, about 9MB on disk. After Excel's recent update to the latest current channel (Version 2408 (Build 17928.20114)), the spreadsheet immediately runs up to 4GB+ in the initial calculation process after opening and Excel crashes. Repair of the spreadsheet finds no errors. I reverted to Version 2407 (Build 17830.20166) and the spreadsheet has no issues. Curious if anyone else is experiencing a similar issue with the latest build.
Update: Testing in progress, but issue appears resolved with Version 2409 (Build 18025.20030).
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u/AxelMoor 12 24d ago
Are there any links? Mainly external (internet), linked images, calls in the workbook, or PowerBI for external data (network, internet, etc).
Version 2408 (Build 17928.20114) changed a lot in this regard. To increase the performance of business networks, 365 now accumulates a lot of data on the local computer to avoid network traffic as if it were a kind of cache - and it is (very) large indeed.
Look in the workbook for any links or objects that currently, or in the past, gathered external data, and supposedly should be disabled.
Check if the workbook data is all of local origin, or if it was downloaded from the internet at some point.
If the workbook does not have any form of external communication, create a new workbook without any content and check the behavior of Excel in Memory and Network in the Task Manager - check the Excel settings for any network activity, unauthorized downloads, obtaining external data, sharing, services such as Azure or associated with Purview, etc.
Check the Account in Excel >> Files the status of your subscription.
It is hard to analyze without physically seeing what is happening.