I am on Max OSX, LyX 2.2.0, with tex4ht installed.
I have a master document with 4 child documents. Exporting any of the child documents individually as ODT works fine, but trying to export the whole thing from the master document gives me the error "No information for exporting the format OpenDocument (tex4ht)".
In fact, the menu option isn't there in the master, and I try to do it by selecting an output format in the "Export as..." dialog.
I haven't spotted anything obvious in the document settings for the master document that is different from the children, but I don't really know what to look for.
My question: is there a known problem with exporting a document containing child documents, or is there something I should check in either the preferences or document settings that may be causing the problem?