From mapscript cannot loadquery after savequery with results parameters to true

[ivanobrunet]

I have an application written in .net with mapscript c# that serialize mapserver query in this way: if ((this._MapObj.saveQuery(this.MapservFilesDir? + "/MapservFiles/tmp/" + qGuid,mapscript.MS_YES)) == (int)MS_RETURN_VALUE.MS_SUCCESS){[do some code]}

then I de-serialize this way:

int res = this._MapObj.loadQuery(this.MapservFilesDir? + "/MapservFiles/tmp/" + qString);

On load I receive frequently error such this: loadQueryResults(): General error message. failed to read result 0 from query file stream and this: loadQueryResults(): General error message. failed to read bounds from query file stream

I attach some example files that generate error