The RunParameter creates 2 environment variables which contain a '.' character.

I cannot reference these environment variables from a bash script due to this character.

env
PARAMETER_X=http://xxx/jenkins/job/ASE_CI/2072/
PARAMETER_X.number=2072
PARAMETER_X.jobName=ASE_CI

echo ${PARAMETER_X.number}
${PARAMETER_X.number}: bad substitution

Can you also create environment variables which use an underscore?
PARAMETER_X
PARAMETER_X_NUMBER
PARAMETER_X_JOBNAME