• Summary. A Jenkinsfile containing strings is using triple-single quoted strings which should not support interpolation. However, on import an error is thrown because of a dollar sign in this string. Syntax of the string itself appears correct.
• Steps to reproduce. Issue exists in single environment and has not yet been reproducible.
• Expected behavior. Due to the use of a non interpolated string in the groovy, a dollar sign in the string should result in nothing taking place on parsing of the Jenkinsfile
• Actual behavior. When the Jenkinsfile is imported, it throws this error:

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed: 
WorkflowScript: 140: illegal string body character after dollar sign; 
solution: either escape a literal dollar sign "\$5" or bracket the value expression "${5}" @ line 140, column 58. 
--stack-name "${THISARN}" | grep

The stage that causes this error is:

stage('Selecte an Account') { 
steps { 
script { 
env.ACCOUNTDATA = input message: 'Pick AWS Account', 
parameters: [choice(name: 'ACCOUNTDATA', choices: AccountMap.toList(), description: 'AWS account name and number')] 
env.ACCOUNTNAME = sh( 
script: '''\ 
#!/bin/bash\ 
echo "${env.ACCOUNTDATA}" | awk -F ":" '{print $1}'\
''', returnStdout: true) 
env.ACCOUNTNUMBER = sh( 
script: '''\ 
#!/bin/bash \ 
echo "${env.ACCOUNTDATA}" | awk -F ":" '{print $2}'\
''', returnStdout: true) 
} 
} 
}

• Workaround.  Defining the variable using env.VARIABLE or using a def variable allows this to work as expected.
• Business impact. This issue is hindering the ability to quickly move existing shell scripts from an environment into a Jenkinsfile. The workaround allows proper functionality, but isn't ideal.