Error upgrading a database to a newer version

[Former user]

I open a database and receive the following message:

---

Update needed

An update to the database structure is available and the database amstrad - magazines - mundo amstrad (es) will be converted.

It will take some minutes to complete.

Yes No

I answer Yes and then the database upgrade process starts.

Sometimes, after a while (during the upgrade process, i get the error shown in the attached image. Here are the log entries before this error occurs:

Add database 'Amstrad - Magazines - Mundo Amstrad (ES) (TOSEC-v2019-04-22_CM)' Loading Amstrad - Magazines - Mundo Amstrad (ES) (TOSEC-v2019-04-22_CM) Ready Update db 'amstrad - magazines - mundo amstrad (es)' from 4.0412 to 4.0418 Ready Ready Prepare data for export Export from old to new db (5035 items)

C:\Users\USER\AppData\Local\Temp\romcenter>chcp 65001 1>nul C:\Users\USER\AppData\Local\Temp\romcenter>"C:\Program Files\RomCenter\firebird32\fbcopy.exe" C :@"C:\Program Files\RomCenter\datas\DBs\Amstrad\Amstrad - Magazines - Mundo Amstrad (ES) (TOSEC-v2019-04-22_CM).rdt" :@"C:\Program Files\RomCenter\datas\DBs\Amstrad\Amstrad - Magazines - Mundo Amstrad (ES) (TOSEC-v2019-04-22_CM).new" 0<"C:\Program Files\RomCenter\firebird32\export4.04.def" Copying table: DATAFILETMP Connecting to: '' as ''...Connected. Reading charset: UTF8, disconnecting...ok. Reconnecting with new charset...Connected. Connecting to: '' as ''...Connected. Reading charset: UTF8, disconnecting...ok. Reconnecting with new charset...Connected. Disabling triggers...done. New format detected. Checkpoint at 2000 rows. Checkpoint at 4000 rows.

[Wanderer]

Note that in this case, no part of the message is written to the log.

[Eric Bole-Feysot]

There is no attached image. I will try with the dat.