CheckProperty a boucle in testcomplete

Change your code to the following:

for (var row=0;row<=this.grdDocuments.wRowCount-1;row++)       {
 
aqObject["CheckProperty"](this.grdDocuments,'wValue(' + row + ', "Statut")', cmpEqual, 'CP');
}

row, being a variable, needs to be evaluated as such.  As you had it, the string 'row' was being sent to the wValue property instead of the value of the variable row