> Cannot reproduce that here. Which version, which dataset, which dummy?

sven,

I'm using Version 2016d. Specifically, I have a dataset of 63 observations, consisting of of 3 different categories each with 21 members. I have defined a dummy for each sub-set i.e 3 dummies. So, I first select a sample based on one of the dummies/Use dummy variable/ which gives me a sample of 21. I then select/Random sub-sample/ and receive the message Number of observations to select (max 62) - it list 10 as the default. If, for example, I enter 22 I get the message Invalid number of cases 22. If I click ok again it reports dropped 41 observations. Clearly not appropriate. Perhaps a few if conditions greater than/less than are required in the code in order to captures the breaches in the conditions. Thanks.

George