It could be because 2019 Marc is installed in Windows / program files by default, which has space in the path. Create a new directory without any space or special character in the path ex: D:\Marc_2019 and install Marc in this directory. Later you can submit the job using command D:\Marc_2019\marc2019.1\tools\run_marc -j input_file.dat
An alternative method without changing the installation directory is using the command inside double quotes ex: "C:\Program Files\MSC.Software\Marc\2019.1.0\marc2019.1\tools\run_marc" -jid input_file