'Namespace' object has no attribute 'gpu_devices'

Sir,

I am getting the following error while running pbrun applybqsr on fastq files (both command line and error traceback):

Command:

pbrun applybqsr --ref /home/vivekr/refs/hg19/ucsc.hg19.fasta --in-bam /home/vivekr/bqsr/SRR2128432_mark.bam --in-recal-file /home/vivekr/bqsr/SRR2128432_recal.txt --interval-file /home/vivekr/refs/hg19/hglift_genome1.bed --out-bam /home/vivekr/bqsr/SRR2128432_bqsr.bam 

Error meaasge:

Traceback (most recent call last):
File "/usr/bin/pbrun", line 14, in <module>
pbmaster.pb_main(runArgs)
File "/opt/parabricks/pbmaster.py", line 248, in pb_main
RunDNABricks(runArgs, IOMapping)
File "/opt/parabricks/pbmaster.py", line 204, in RunDNABricks
if runArgs.runArgs.gpu_devices == "all":
AttributeError: 'Namespace' object has no attribute 'gpu_devices'

Kindly suggest how to rectify this error. Thanks.