You are unable to import stock movement because your automated import program i8x.exe is failing with error 65280:
Make sure that SKU barcode length doesn't exceed 12 characters which is the maximum size of the barcode. If you are trying to import SKU barcodes with 13 characters lengths, then you need to remove the last character as it is used as a check character for the SKU.
Once you have removed the last character your barcode number should only contain 12 characters and this should allow the import to process.
Find more information about barcodes in the attached upc_barcodes_advice.pdf file.