app.findGrepPreferences = app.changeGrepPreferences= NothingEnum.nothing; 
   
        app.findChangeGrepOptions.includeFootnotes = false; 
        app.findChangeGrepOptions.includeHiddenLayers = false; 
        app.findChangeGrepOptions.includeLockedLayersForFind = false; 
        app.findChangeGrepOptions.includeLockedStoriesForFind = false; 
        app.findChangeGrepOptions.includeMasterPages = false; 
 
        app.findGrepPreferences.appliedParagraphStyle= 
        app.activeDocument.paragraphStyles.item("preis_GREP");   
        app.changeGrepPreferences.appliedConditions =  
        [app.documents[0].conditions.item("preis")];  
        app.documents[0].changeGrep();  
 
  
 
        app.findGrepPreferences = app.changeGrepPreferences = null;  
        app.findGrepPreferences.findWhat = "~y.+"; 
        app.changeGrepPreferences.appliedConditions =  
        [app.documents[0].conditions.item("preis")];  
        app.changeGrepPreferences.changeTo=$0;  
        app.documents[0].changeGrep(); 

app.findGrepPreferences.findWhat = "~y.+"; 
app.changeGrepPreferences.changeTo=$0; 

app.findGrepPreferences.findWhat = "~y.+"; 
try{ 
app.changeGrepPreferences.changeTo=$0; 
}catch(e){ $.writeln(e.number +" , "+e.message )};