how to get rid of proc genmod log error message

[HitmonTran]

Hi I am receiving an error in log message for proc genmod when determining Relative Risk.  This is caused because there are results for one treatment arm and zero for the other.  Since my current program is macrotized with other subsets, it doesn't always display a message.

So, how would I prevent the log from displaying an error message in this situation? thanks

	proc genmod data = aetime; 
		class actarm(ref='Placebo') usubjid;
		model aecnt = actarm  
		      / dist = poisson link = log offset=futime;
		estimate 'Rel Risk' actarm 1 -1/ exp;
		repeated subject = usubjid/ type = unstr;
		ods output estimates=RELRISK(where=(label='Rel Risk'));
	run;

[ballardw]

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@HitmonTran wrote:

Hi I am receiving an error in log message for proc genmod when determining Relative Risk.  This is caused because there are results for one treatment arm and zero for the other.  Since my current program is macrotized with other subsets, it doesn't always display a message.

So, how would I prevent the log from displaying an error message in this situation? thanks

	proc genmod data = aetime; 
		class actarm(ref='Placebo') usubjid;
		model aecnt = actarm  
		      / dist = poisson link = log offset=futime;
		estimate 'Rel Risk' actarm 1 -1/ exp;
		repeated subject = usubjid/ type = unstr;
		ods output estimates=RELRISK(where=(label='Rel Risk'));
	run;

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If you know the cause is " are results for one treatment arm and zero for the other" then test that before calling the procedure. If the error case is in effect do not call the procedure.

You need to decide what the result data set should look like in that case.