CQbatch fails to start on some versions of linux with an import error about libk5crypto.so.3

Modified on Fri, 11 Jul at 12:06 PM

On some versions of Linux ConQuest or cqbatch may fail to start with an error like this

Traceback (most recent call last):
  File "cqbatch.py", line 4, in <module>
  File "/opt/ccdc/third-party/conquest_python/conquest_python-2.7.18-9-linux/lib/python2.7/site-packages/PyInstaller/loader/pyimod03_importers.py", line 395, in load_module
  File "system.py", line 9, in <module>
  File "/opt/ccdc/third-party/conquest_python/conquest_python-2.7.18-9-linux/lib/python2.7/site-packages/PyInstaller/loader/pyimod03_importers.py", line 395, in load_module
  File "commoncode/dblist.py", line 9, in <module>
  File "/opt/ccdc/third-party/conquest_python/conquest_python-2.7.18-9-linux/lib/python2.7/site-packages/PyInstaller/loader/pyimod03_importers.py", line 395, in load_module
  File "database/entry_reader.py", line 24, in <module>
  File "/opt/ccdc/third-party/conquest_python/conquest_python-2.7.18-9-linux/lib/python2.7/site-packages/PyInstaller/loader/pyimod03_importers.py", line 395, in load_module
  File "database/conquest_aser_adapter.py", line 10, in <module>
  File "/opt/ccdc/third-party/conquest_python/conquest_python-2.7.18-9-linux/lib/python2.7/site-packages/PyInstaller/loader/pyimod03_importers.py", line 684, in load_module
ImportError: /mnt/CCDC/ccdc-software/conquest/lib/libk5crypto.so.3: undefined symbol: EVP_KDF_ctrl, version OPENSSL_1_1_1b
[2415] Failed to execute script cqbatch

The solution is to rename or delete the file libk5crypto.so.3 located in CCDC/ccdc-software/conquest/lib. This should force your system version to be used instead.

If the error persists, ensure that your Linux system is up to date. On RHEL 8 and clones you may also have to remove the files libcrypto.so.1.1 and libssl.so.1.1 in the same directory.