Onboarding issue

[shameerg]

I am trying to onboard devices via .csv, however i'm getting the following popup message:
The following devices failed:
HOSTNAME undefined
PVMS-OFFICE1-410undefined
PVMS-OFFICE2-410undefined
PVMS-CAFE1-410undefined
PVMS-CAFE2-410undefined
PVMS-LD-305undefined
PVMS-SPEECH-305undefined
PVMS-MEDIACENTER1-410undefined
PVMS-MEDIACENTER2-410undefined
PVMS-CR1-305undefined
PVMS-CR2-305undefined
PVMS-SCICR-305undefined
PVMS-ART-305undefined
PVMS-VETCH-410undefined
PVMS-CR3-305undefined
PVMS-SCILAB-305undefined
PVMS-CR4-305undefined
PVMS-CR5-305undefined
PVMS-CR57-305undefined
PVMS-CR8-305undefined
PVMS-GYM2-410undefined
PVMS-GYM1-410undefined

If I onboard one at a time via SN, they add successfully. However, then they just have the following message:
This device has not yet made a connection with ExtremeCloud IQ. It can take up to 10 minutes for a device to appear after the initial onboarding process. If the device has not successfully connected after 10 minutes, follow this link for more information: https://extremeportal.force.com/ExtrArticleDetail?an=000099673

I have previously onboarded successfully with a similar file.

[SamPirok]

Hi Shameer, I'm still looking in to what would cause the undefined messages for you, but to help get your APs connected in the mean time, I would suggest the steps outlined in this guide.