Hi Aggelos ,
Error code is related to LUN space. Need to verify that the SnapInfo LUN has not run out of space.
[15:22:05.347] #1 : [EC001QLMAIN - Northwind] : Failed with error code 0xc0040807.
[15:22:05.347] #1 : [EC001QLMAIN - Northwind] Error : Failed to open the snapinfo metadata file.
I would request you to contact storevault support on below toll free number or send a mail to Customer_Support@storevault.com for further assistence.
Australia:1-800-067-128 | North America:1-877-278-7858 | United Kingdom:0-808-234-1686