IBM HTTP Server - CTGSK3024W Invalid value for parameter from GSK

I hit a wee problem with the Global Security Toolkit (GSK) when creating a certificate for IBM HTTP Server 8.5.5.2

This is the command that I was running: - 

/opt/ibm/HTTPServer/bin/gskcapicmd -cert -create -db /opt/ibm/HTTPServer/ssl/keystore.kdb -pw passw0rd -size 2048 -dn "bam8012.uk.ibm.com,o=ibm,c=us" -label "bam8012.uk.ibm.com" -default_cert yes

which resulted in: -

CTGSK3024W Invalid value for parameter "-dn" (bam8012.uk.ibm.com,o=ibm,c=us). 

It was, of course, user error.

This is what I should have run: -

/opt/ibm/HTTPServer/bin/gskcapicmd -cert -create -db /opt/ibm/HTTPServer/ssl/keystore.kdb -pw rlmp56Hn3uWh -size 2048 -dn "bam8012.uk.ibm.com\\,o=ibm\\,c=us\\" -label "bam8012.uk.ibm.com" -default_cert yes

In other words, I needed to insert '\\' before each comma ( , )