My C with MQ receive a message return code 2037

Question

I run the C program, which connect to MQ and try to get a message from it. I always get a message:
MQGET ended with reason code 2037
which means that MQ is not

Answer 1

MQRC 2037 is MQRC_NOT_OPEN_FOR_INPUT, you can find this information by running the mqrc command provided with the IBM MQ Client or server install, below is a sample output on a Linux server:

$ mqrc 2037

      2037  0x000007f5  MQRC_NOT_OPEN_FOR_INPUT

You do not show the MQOPEN call but if it is using the O_options, it would be explained by this, you currently have the following:

O_options = MQOO_OUTPUT + MQOO_FAIL_IF_QUIESCING; 

This should someing like the following:

O_options = MQOO_INPUT_AS_Q_DEF + MQOO_FAIL_IF_QUIESCING; 

I would suggested that you review the sample applications provided with the IBM MQ install. On Linux these would be located in /opt/mqm/samp. The sample amqsget0.c would be similar to your program except it is using a MQCONN not MQCONNX.