CTFFIND4 crashes with "ERROR: cannot find line with Final values in Micrographs"

I am running Relion 1.4. For the third time, with different data sets, my CTFFIND4 run fails (at the very end, so after many many hours) with the following message (this is the end of the log file):

Estimating CTF parameters using Niko Grigorieff's CTFFIND ...
27.76/27.76 hrs ............................................................~~(,,">
ERROR: cannot find line with Final values in Micrographs/16sep17b_IrIn7_00003gr_00002sq_v02_00003hln_v01_00002epn-a_ctffind3.log
File: src/ctffind_runner.cpp line: 299
-------------------------------------------------------
Primary job terminated normally, but 1 process returned
a non-zero exit code.. Per user-direction, the job has been aborted.
-------------------------------------------------------
--------------------------------------------------------------------------
mpiexec detected that one or more processes exited with non-zero status, thus causing
the job to be terminated. The first process to do so was:
Process name: [[11301,1],19]
Exit code: 1_

The line it's looking for exist in the .log file (I checked). As a result it does not generate the star file necessary to move on. Please advise.

Thanks - Giovanna