I just learned from this stack overflow post that if parameters are not configured correctly (if you are missing a required parameter) when using DTExec to run a package from the command line, your package will forever be stuck in a "Created Execution" status, and never actually run.
Some similar odd behavior is occurring when I have a semicolon within my SSIS package parameter when using DTExec. If there is a semicolon in a parameter, DTExec simply says:
"The syntax of the command is incorrect."
DTExec.exe /ISSERVER "\SSISDB\Data Feeds\Data Feed Project\Data Feed.dtsx" /SERVER "." /parameter RequiredParameter(string);parameter;value;has;semicolons
What is the correct syntax? Escaping the semicolons does not seem to work.