RTOS/AWR1642: How much CAN-FD can be declaration in MMWave demo?

Tool/software: TI-RTOS

I try to add 16 CANFD_createMsgObject for Tx.

 for( i = 0; i < 16; i++)
 {
    txMsgObjectParams.msgIdentifier = 0xC1+i;
    txMsgObjHandle[i] = CANFD_createMsgObject (canHandle, &txMsgObjectParams, &errCode);
 }

When I declaration more than 15 CANFD_createMsgObject for Tx, the awr1642 is crashed.

Does it the msgIdentifier be overflow?

Or it can declaration too more CANFD_createMsgObject ?