I am trying the zoho remote api for uploading documents, I am using the sample multipart form with my own api key and save_url as indicated in http://writer.zoho.com/public/help/writer.remoteapi/fullpage 

I keep getting this response very often when trying to upload a document, specially the ones in format ".odt", the ones ".txt" upload and open OK most of the time.

WARNING=Unable to import content RESULT=FALSEERROR_CODE=1841 

I have tried with mozilla, chrome and ie, and it still happens; it usually doesn't happen the first time I try to open a document but the next ones after that would most likely fail. I would like to get some pointers or at least to get an explanation of what this error means because i couldn't find anything about it.

Thank you very much.