We’ve recently released a new hotfix for Microsoft Dynamics AX 2012, relating to the genlicense command for axutil that ISVs will use to generate licenses for their solutions.
The issue was that certain customer serial numbers containing alpha characters may cause the license generation process to fail with the error: “the serial number specificed in the ISV license is invalid”
You can request to download the fix at the link below:
http://support.microsoft.com/hotfix/KBHotfix.aspx?kbnum=2624064&kbln=en-us