Excel errors in BAS

[aronax]

I created a script that reads and writes data in an excel file, using the excel module for the following actions: count rows, read cell, write to cell. There is also another script that simultaneously reads and writes data in this xlsx file. The file has 40 rows (10 Kb)
Everything works great for 1-2 hours, but the excel file starts to grow and reaches about 400-500 Kb, though new data is not added but old data is being updated.
When this happens all the threads that are using this file are getting this error:

...and the file becomes corrupted and I cannot open it anymore

I tried switching to csv, but when trying to count all the rows, I'm getting this error:

Anybody has any idea what I'm doing wrong with this excel module?

LE: Found on the forum that switching to CSV cannot be done with the excel module. But haven't found any fix for the main problem (xlsx file growing and corrupted)

[m4zuper]

This may be due to the file being used by two projects at the same time.
In any case, I would like to ask you to attach the file and the projects so that I can look into your problem. You can attach the files here or in a private message on the forum.