NullPointerException with AttributeConstructionsLoader

furt

Hello,

I am using a genetic algorithm (in this case the AGA) to generate new features, which are written to a file by the AttributeConstructionsWriter operator. Then, in another project, I load the very same data as in the first project and try to reconstruct the attributes via AttributeConstructionsLoader, but that operator produces a NullPointerException:

NullPointerException
process failed
Message: null

This is the construction file I try to read:

<?xml version="1.0" encoding="US-ASCII"?>
<constructions version="4.4">
    <attribute name="Hillas_Dist0" construction="Hillas_Dist0"/>
    <attribute name="Hillas_Area" construction="Hillas_Area"/>
    <attribute name="Hillas_CosDelta" construction="Hillas_CosDelta"/>
    <attribute name="HillasExt_M3Trans" construction="HillasExt_M3Trans"/>
    <attribute name="ImagePar_NumSatPixelsHG" construction="ImagePar_NumSatPixelsHG"/>
    <attribute name="gensym13" construction="(Hillas_BorderLine * ImagePar_NumSinglePixels)"/>
    <attribute name="Hillas_Length" construction="Hillas_Length"/>
    <attribute name="Hillas_Size" construction="Hillas_Size"/>
    <attribute name="Hillas_MeanX" construction="Hillas_MeanX"/>
    <attribute name="Hillas_BorderLine" construction="Hillas_BorderLine"/>
    <attribute name="ImagePar_SizeMainIsland" construction="ImagePar_SizeMainIsland"/>
    <attribute name="HillasExt_M3Long" construction="HillasExt_M3Long"/>
    <attribute name="ImageParNew_ConcCore" construction="ImageParNew_ConcCore"/>
    <attribute name="gensym95" construction="(ImageParNew_ConcCore + 1/(ImageParNew_NumCorePixels))"/>
    <attribute name="gensym96" construction="(ImagePar_SizeSinglePixels + 1/(ImageParNew_NumCorePixels))"/>
    <attribute name="gensym97" construction="((ImagePar_SizeSinglePixels + 1/(ImageParNew_NumCorePixels)) / (Hillas_BorderLine * ImagePar_NumSinglePixels))"/>
    <attribute name="gensym104" construction="(ImagePar_NumSatPixelsHG + HillasExt_M3Long)"/>
    <attribute name="gensym105" construction="((ImagePar_SizeSinglePixels + 1/(ImageParNew_NumCorePixels)) pow Hillas_BorderLine)"/>
    <attribute name="gensym113" construction="(ImagePar_SizeSinglePixels * Hillas_Length)"/>
    <attribute name="gensym114" construction="(((ImagePar_SizeSinglePixels + 1/(ImageParNew_NumCorePixels)) pow Hillas_BorderLine) pow Hillas_Width)"/>
    <attribute name="gensym116" construction="(ImagePar_SizeSubIslands * (ImagePar_SizeSinglePixels + 1/(ImageParNew_NumCorePixels)))"/>
    <attribute name="gensym117" construction="((ImageParNew_ConcCore + 1/(ImageParNew_NumCorePixels)) / ((ImagePar_SizeSinglePixels + 1/(ImageParNew_NumCorePixels)) pow Hillas_BorderLine))"/>
    <attribute name="gensym118" construction="(1/(ImageParNew_NumCorePixels) * (ImageParNew_ConcCore + 1/(ImageParNew_NumCorePixels)))"/>
</constructions>

All attributes used in the formulas are present in the example set. Is there something wrong with this file?

I am using RapidMiner 4.4 with java-1.6 on Linux.

land

Hi,
that was a bug occuring with these more complex braced expressions. Unfortunately there is no easy way arround, but you might copy the expressions manually into a feature construction operator, if you have to do this just once.
It is somehow ill timed, because we have just published the 4.5 release, so the next release will take some time. In theory, you could download the newest CVS version, but we have some problems with synchronizing our local repository with the public one on source forge. Our Admins struggling with that and we hope to solve this problem in the next days. If you want, I can write you, as soon as the bugfixed version is available.

Greetings,
  Sebastian