Redirecting log to stderr while keeping a command prompt in UNIX SAS

[tomcmacdonald]

I'm trying to get the system options correct for a interactive SAS session.  I building a sort of task runner in Python using saspy as a guildline:

https://github.com/sassoftware/saspy

This is the current command I run to invoke a session:

/sas/sas94/SASFoundation/9.4/sas -nodms -nosource -nonews -pagesize MAX -errorcheck strict -errorabend

I would like to use some of the interactive features found with the -nodms flag where a prompt with the pattern

  [:number:]?

appears.  I want to use the appearance of this prompt to indicate when new code can be submitted to the SAS session.  However I cannot use this feature in conjunction with the -stdio flag which would redirect log to stderr.  Is there anyway to have the prompt and the redirection at the same time. 

[tomcmacdonald · Accepted solution]

OK, I'm removing the -nodms flag and adding the -stdio flag.  -stdio seems to provide a prompt that I can work it.