strangely, one of my modems on the area could not success AT+CLIP=1 in embedded application. I follow the log on that modem and i see that AT+CLIP=1 responses error. I use adl_cmdCreate funtion to execute that.
It doesnt make any sence because the same software is running other 10 modems and there is no problem with them. What are the possible reasons that i should research on? I can not make alot of thing to modem because it is far away being used by a customer.