An "cannot find symbol" error appears when trying to build all JOSM plugins

[jBeata]

The following error appears when building the plugins:

init:

[mkdir] Created dir: D:\Java\Workspaces\josm\josm1\plugins\surveyor\build

compile:

[echo] creating ../../dist/surveyor.jar

[javac] Compiling 30 source files to D:\Java\Workspaces\josm\josm1\plugins\surveyor\build

[javac]D:\Java\Workspaces\josm\josm1\plugins\surveyor\src\at\dallermassl\josm\plugin\surveyor\SurveyorShowAction.java:74: cannot find symbol

[javac] symbol : methodaddPropertyChangeListener(at.dallermassl.josm.plugin.surveyor.SurveyorComponent)

[javac] location: class livegps.LiveGpsPlugin
[javac] gpsPlugin.addPropertyChangeListener(comp);
[javac]

As far I had seen the problem is that the LiveGpsPlugin class has no method called "addPropertyChangeListener" .