While importing artifacts using LCM you may run into the below error:
EPMLCM-13000: Service currently not available.
This issue is caused by unpublished Bug 18327819 - LCM IMPORT FAILS WITH "MAX ERRORS THRESHOLD" SET AS "<=100" IN MIGRATION OPTIONS
1. Login to Shared Services Console with administrator user.
2. Change the value of "Shared Services - Max Errors Threshold" under Administration->Migration Options to "5000".
3. Attempt to Import or Export artifacts again.