Getting errors when using cpimport mode 3

Loading a simple table gets an error, but only in mode 3:

CREATE TABLE test.a(c1 INTEGER) ENgine=ColumnStore;

Then a simple data file, a.dat:

100

200

Then run cpimport:
$ cpimport test a -m3 a.dat
And the result is:
Locale is : C

Using table OID 3399 as the default JOB ID
Input file(s) will be read from : /home2/anders/src/m17/csload
Job description file : /usr/local/Calpont/data/bulk/tmpjob/3399_D20170324_T171324_S118317_Job_3399.xml
Log file for this job: /usr/local/Calpont/data/bulk/log/Job_3399.log
2017-03-24 17:13:24 (23117) INFO : successfully loaded job file /usr/local/Calpont/data/bulk/tmpjob/3399_D20170324_T171324_S118317_Job_3399.xml
2017-03-24 17:13:24 (23117) INFO : Job file loaded, run time for this step : 0.378337 seconds
2017-03-24 17:13:24 (23117) INFO : PreProcessing check starts
2017-03-24 17:13:24 (23117) INFO : input data file /home2/anders/src/m17/csload/a.dat
2017-03-24 17:13:24 (23117) ERR : Backup error opening column file for OID-3400; DBRoot-1; partition-0; segment-0 [1052]
2017-03-24 17:13:24 (23117) CRIT : Error in pre-processing the job file for table test.a [1052]

Error in loading job data