Forum Post: tx_mutex_get returns error in threadx synergy

Hi all, I have created a timer where i call some function. In that function when i try to acquire the mutex using threax api tx_mutex_get(&m_hTimerMtxLockHandle, TX_WAIT_FOREVER); it returns TX_WAIT_ERROR (0x04) ( A wait option other than TX_NO_WAIT was specified on a call from a non thread.) and when i pass the 2nd argument as TX_NO_WAIT it returns TX_CALLER_ERROR (0x13) ( Invalid caller of this service.) What could possibly go wrong ? Thank you :)