qcrypt:test.rbf:8068: unexpected end-of-file - qcrypt:test.rbf:8068: unexpected end-of-file Hi When running Qcrypt on my working RBF configuration file I get the following result: C:\Users\steve>D:/intelFPGA/21.1/quartus/bin64/qcrypt --encrypt --keyfile=keyfile.key --keyname=key1 --keystore=otp test.rbf test_qcrypt.rbf Intel qcrypt 1.5 built at 12:02:50 on Aug 15 2017 Copyright (C) 2015-2017 Intel Corporation. All Rights Reserved. qcrypt:test.rbf:8068: unexpected end-of-file Any clues as to what could be wrong would be appreciated - I am confused as the unencrypted RBF file works fine with passive serial configuration.. Thanks Steve Replies: Re: qcrypt:test.rbf:8068: unexpected end-of-file Sorted -- according to AN-556: "Encryption and compression cannot be used simultaneously in 20 nm FPGAs." Assignments->Settings->"Device and Pin Options..."->Configuration->"Generate compressed bitstreams" seems to be checked by default -- unchecked and the rebuilt RBF gets encrypted correctly by "Qcrypt" tool (at double the size...).