Hi,
We had same issue and sapnote : 1239726 was cannot be implemented state
We have Checked in dev_rd and found that there was issue in gateway services. In satellite system SMGW transaction was not working and RFC from DEV to QAS also not working.
After restarting the gateway processes issue has been resolved and RFC connections working fine. Charm is imported successfully.
Regards,
Shaik Maideen A