[AX2012] Error code: 38 = Filename too long

When print ssrs report VendInvoiceDocument the error showed up. It said that the filename is too long. After I checked the size of the file (my case: axapd.alt), the file was corrupted. In normal size the file size is 8KB but currently the size is 1KB. Stop the AOS and replaced the corrupted file with the normal file and then start the AOS. Well, it worked fine.