Rprof in Windows

Dear list,

I am currently using R 1.6.1 on Windows XP. I am trying to profile a
lengthy program I have. I managed to obtain the profile twice using
Rprof() and then summaryRprof(). But after that, all further attempts
indicate that no events have  been recorded in the .out file.

Rprof()
[my program]
Rprof(NULL)
summaryRprof()

Error in summaryRprof() : no events were recorded

The Rprof.out file is created, but it only contains the line on the length
of the interval. Could there be a parameter or option that I should check
or that might have been changed unadvertedly?

Thank you for any help,

Sharon K?hlmann

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
SHARON K?HLMANN-BERENZON

Tel. +46-31-772 53 60			Dept. Mathematical Statistics
Fax. +46-31-772 35 08			Chalmers University of Tech.
e-mail: sharon at math.chalmers.se		Eklandagatan 86
					412 96 G?teborg, Sweden