R help - Mar 2006 - front- end problem while using nnet and tune.nnet

Dear R people,

I am using tune.nnet from e1071 package to tune the parameters for nnet.
I am using the following syntax:

tuneclass <-c(rep(1,46),rep(2,15))   
tunennet 
<-tune.nnet(x=traindata,y=tuneclass,size=c(50,75,100),decay=c(0,0.005,0.010),MaxNWts
= 20000)

Here traindata is the training data that I want to tune for nnet which 
is a matrix with 61 rows(samples) and 200 columns(genes).
tuneclass is the class indicator vector which says that the first 46 
samples of the traindata are of class 1 and the next 15 samples are of 
class 2 type.

The problem that I encountered was, when I used a higher size  like 50 
or more then it gave me the following error:
R for Windows terminal front-end has encountered a problem and needs to 
close.  We are sorry for the inconvenience.
I didn't get this error for size <25. But even in such cases the program 
took huge amount of time.

I really don't understand what the problem is and how to solve this.
Can anyone please help me asap?

Thanks in advance,
Regards,
Madhurima.


	[[alternative HTML version deleted]]