When exporting barcodes as image files, if you get an error "SystemError=20014 LEAD Error: Not able to open file (ltocx13n) [Details: frmChild::::mnuExportAsImageFile_Click()]", this indicates a permission issue, either trying to write to a directory that it does not have permission to create a file in, or it is trying to overwrite a file that it cannot overwrite.

Make sure the export is directed to a valid directory and is not trying to overwrite another file, then try the export again