z/OS Communications Server
x’3001’ RC_LU_INUSE


x’3001’ RC_LU_INUSE

The luname identified in the EZZ6034I/EZZ6035I messages is in use for another Telnet connection. 
This error can happen if a TN3270E client specifies an luname which is in the DEFAULTLU pool in
the profile. Any client not specifying an luname on their Telnet connection request will be assigned
an lu from this pool.  If you would like to reserve this luname for a specific client,  move the luname
from the DEFAULTLU pool to the DEFAULTSPECLU pool.  Only TN3270E clients that can request
a specific luname will be assigned lu’s from this pool.