Hi, 

Assuming this is a test environment you can set a default project cost / rev element. 

Project needs to know where these values will appear in the project. For example does the posting string represent material, labor, travel or other.  Your set up uses a code part PCRE for that designation. Posting control / other needs to be dined to provide that value.  You can establish a default and then anything that default would indicate a need to fine tune. 

Best regards, 

Thomas