Arduino stops working

Projects Programming
1

I'm working on Arduino with module sim908, but i have problem.Arduino stops when i send message to monitor.Everything is good when i clear sendSMS function (//) in main.

_GPRS.ino (4.84 KB)

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2

This makes the bunch of warnings vanishint8_t sendATcommand(const char* ATcommand, const char* expected_answer, unsigned int timeout) {
There is no check against buffer overruns in this routine,
so any message longer than response will probably corrupt the system.