Can't open the DAA file

Dear Daniel and MEGAN users,
I was trying to export taxon table from .daa files, while there were two files I couldn’t open with MEGAN. However, the other files could be opened normally. And I get the Error message “Error: Execute failed: DAA file has not been meganized: my path
FileNotFoundException: Untitled (No such file or directory)”, but the files definetely exist!

Hope for your reply.
Best wishes,