Check the cause of the error encountered in the application when executing it, as per checking, the data the error is referring to is correct, the data is an integer. Check with sir Roland if he is executing a parser, as per sir Roland, if he does, it might be the cause of the error because we are parsing the same data. He stopped the processing on his side and I processed it again. As per checking, the file that encountered an error was parsed successfully. And other files are still parsing, and so far no error is encountered. Will continue to monitor the processing if no more errors will be encountered.