When converting to Excel, you may get an out of memory error. We're talking very large files, a million terms or so. Basically, only the IATE termbase.

See the Excel Large File Mode setting for a possible workaround.

When converting from Excel, you may get a similar error. As a workaround, try exporting the file in Excel to a Unicode txt file, and use that txt file as the input for the Glossary Converter

Generally, when you have a memory error, it's worth to close all apps or even restart Windows. Sometimes that frees up extra space to allow the conversion to finish.

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