[rrd-users] changing max value for DS

[Bernhard Bitsch]

I'm using RRDtool with IPCop ( used version is rrdtool-1.0.49 ).
If I try to change the max value of an DS using the lines

use RRDs;
RRDs::tune ("myfile.rrd", "-a usf:60");

I get the error message "invalid arguments for maximum ds value".
Isn't tune fully implmented in that version or what am I doing wrong?

Thx in advance
Bernhard