A method for mobile call testing is provided. The neuropathic gastrointestinal dysfunction refers to disorders associated with motility, sensation and neuromuscular function that include but are not limited to conditions such as delayed gastric emptying. A non-color changing eradicating fluid having a more moderate pH is also disclosed. Numeric core code and data structure initializing core code are generated for the simulator in a high level programming language from the language of the symbolic language translator.