Most AT commands return ERROR

[flau]

Hi, I have a custom board built around a nRF9160.  All GPIO (P0.xx) work.  However, when I test with the at_client only AT+CGSN=1, AT+CGMI, AT+CGMM and AT+CGMR return with the expected string.  All other commands return "ERROR".  Any suggestions are very much appreciated.

[flau]

Just found the +CLAC command.  When I try AT+CLAC, these are the results.

AT+CLAC
AT+CGMI
AT+CGMM
AT+CGMR
AT+CGSN
AT%XMAGPIO
AT%XANTDETMAGPIO
AT%XMIPIRFFEDEV
AT%XMIPIRFFECTRL
AT%XCOEX0
AT%XANTCFG
AT%XEMPR
AT%XRFTEST
AT%XMODEMTRACE
AT%XVBAT
AT%XSYSTEMMODE
AT%SHORTSWVER
AT%HWVERSION
AT%XMODEMUUID
AT%XFILEWRITE
AT%XGPIOTEST
AT%XFSSYNC
OK

Is this correct?