What is/was the underlying database?
The underlying database is a MS Access database.
Very strange. This is clearly a JET (Access) issue, why it occurs only when the Access db is "packaged" is strange to me.
What does the query you're firing at Access look like? Is it out of the ordinary in any way? Does Access need to get at other resources it wouldn't be able to when the database is stuffed into the twbx?
I suspect you can't upload the workbook itself, but it would be interesting to see. You may need to open a support case on this one
The query I am firing at Access is a bit complex but the strange thing is that it works in a normal .twb but not in a .twbx wen you open it with reader.
Anyway I found a work-around: make a data extract of the sources that are used by the particular non-working dashboard and package the workbook using the data extracts. I don't get the error anymore (both in reader and in desktop).
Thanks for the help!