libreoffice - unoconv fails to save in my specified directory -

i using unoconv convert ods spreadsheet csv file.

here command:

unoconv -vvv --doctype=spreadsheet --format=csv --output= ~/dropbox  /mariners_site/textfiles/expenses.csv ~/dropbox/aldeburgh/expenses /expenses.ods 

it saves output file in same directory source file, not in specified directory. error message is:

output file: /home/richard/dropbox/mariners_site/textfiles/expenses.csv unoconv: unoexception during export phase: unable store document file:///home/richard/dropbox/mariners_site /textfiles/expenses.csv (errcode 19468) 

i'm sure worked initially, has since stopped.

i have checked permissions , identical both directories.

i translated errcode 19468 , boils down meaning errcode_sfx_documentreadonly.

you can find more information specific meaning of libreoffice errcode numbers unoconv documentation at: https://github.com/dagwieers/unoconv/blob/master/doc/errcode.adoc

the clue here have whitespace-character between --output= , filename (--output= ~/dropbox /mariners_site/textfiles/expenses.csv) , because of unoconv gets empty output value (which means current directory) , given 2 files. , explains why specific error imo