Generally, to differentiate commands from other types of instructions, you enclose the command within single or double quotation marks. If the command is not enclosed within quotation marks, it is processed as an expression and might end in error. For example, the language processor treats an asterisk (*) as a multiplication operator.
Many CICS commands use single quotation marks within the command. For this reason, it is recommended that, as a matter of course, you enclose CICS commands within double quotation marks.
"CICS WRITEQ TS QUEUE('ABC') FROM('test')"