An error occurred while executing an external process: Unexpected end-of-stream reading tree

[Shruti S G]

We are trying to migrate the repositories from CM Plastic SCM application to Bitbucket. Repositories are migrated successfully from Plastic SCM side. But when i check in Bitbucket repository, I can see that all the commits and branches are migrated. But files/folders are not migrated. When we try to access any of the migrated branches from Plastic we get the below error and some times repository can not be accessed further. 

An error occurred while executing an external process: Unexpected end-of-stream reading tree for [* some random numbers *]

Please see your system administrator.

Could you guide to migrate repos from plastic scm application smoothly