[lwip-users] UDP Socket Creation Fails

[Zenger Mathias]

Hi,

Sorry for disturbing but I have a little problem which is making me mad.

I need to add an additional UDP socket to an existing application (it is based on lwIP 1.3.0 and FreeRTOS). No problem I thought and wrote a new task which is creating the socket based on the socket API. Unfortunately the call of socket(..) returns -1 and creation fails. In lwipopts.h I increased MEMP_NUM_UDP_PCB from previous 6 to 8 but this didn't solve the problem.

Has anybody an idea what I missed (perhaps additional needed configuration changes that I am not aware)? Any point in socket creation where I could get some more details why it fails?

Thanks a lot!
Mathias