Hi Thomas,
The file upload limit is currently around a few hundred kbs, so it would certainly not allow 1.4MB, although it sounds like you didn't get a great warning telling you this; we'll make it more obvious.
I don't know SQLite3, but my expectation given I think it is a fairly comprehensive SQL implementation is that it's requirements for RAM in particular are going to be much bigger than what the LPC1768 has; might be worth checking what it requires before attempting a port. It is one of the reasons we don't have a high upload limit; if the files are getting that big, it is often likely it is not appropriate code for mbed and the LPC1768.
Would be great to hear what you find out.
Simon
Where can I get some information about the maximum file size allowed 7 possible in the cloud compiler environment. Backgroud: Yesterday I tried to upload a file with 1.4 MB source code (SQlite3) and I get an error.