Container error

[NestorC]

While executing an event for an advertisement within a container, an error is displayed:
"[Container] error: Unable to play! Error code 2 (unable to open the file/invalid server address).
This incident occurred exclusively with one block out of the 70 blocks scheduled for the day.
What does this error mean?

 

[djsoft]

While executing an event for an advertisement within a container, an error is displayed:
"[Container] error: Unable to play! Error code 2 (unable to open the file/invalid server address).
This incident occurred exclusively with one block out of the 70 blocks scheduled for the day.
What does this error mean?

This error is from inside the container, one of the entries there was non playable because file was not found on the disk.