I just pruchased Aspose.Pdf license and I get that message whenever I try to use either the development or deployment license.
Thanks for your consideration.
Please view thread License file problems. Please use outlook express to download the license.
Sorry for not replying earlier.
The problem is caused by that some email clients add some return keys in the license file. So the workaround is, open the license file and then remove these return keys.
Please let me know if the problem persists.