the execute method of custom geoprocessing tool cannot be invoked

Discussion created by ohohohoh on Oct 26, 2012
Latest reply on Sep 27, 2013 by dougjc
I use Java to create a custom geoprocessing tool and deploy it into ArcGIS 10.0. The user input interface can be showed and no error report. After click "OK", nothing is done. It seems the execute method is not invoked. Any idea about it?