Hi,
I tried to test an UR with structural break in a serie with 41 observations and 6 lags (optimal AIC criteria suggested), and I get this error message:

log time:           5/08/12 18:59
program version:    4.24 (Oct 15, 2009)
debug mode:         false
java vm version:    10.0-b23
os name:            Windows XP
os version:         5.1
GRTE:               true

C:\uni\jmulti\jgauss\src\ur_stbr.src(349) : error G0159 : Wrong number of parameters
Currently active call: autoreg_structbr  C:\uni\jmulti\jgauss\src\ur_stbr.src
Stack trace:
   autoreg_structbr called from C:\uni\jmulti\jgauss\src\ur_stbr.src, line 762
   tauint_structbr
29969 ERROR  com.jstatcom.engine.PCall                 - failed call: UR Test with structural break
java.lang.RuntimeException: Gauss procedure: "tauint_structbr"

C:\uni\jmulti\jgauss\src\ur_stbr.src(349) : error G0159 : Wrong number of parameters
Currently active call: autoreg_structbr  C:\uni\jmulti\jgauss\src\ur_stbr.src
Stack trace:
   autoreg_structbr called from C:\uni\jmulti\jgauss\src\ur_stbr.src, line 762
   tauint_structbr

at com.jstatcom.engine.grte.GRTEngine.call(Unknown Source)
at de.jmulti.proc.StructBreakURCall.runCode(Unknown Source)
at com.jstatcom.engine.PCall.run(Unknown Source)
at EDU.oswego.cs.dl.util.concurrent.QueuedExecutor$RunLoop.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

When I  tried 4 lags or less, the test runs an output like usual…

Where could be the problem, the sample size?

Thanks in advance.