The "error in file length setting"  concerns large containers on external USB-connected drives and  is proved to be hardware-related problem.
Please direct you attention to the USB disk itself, to USB card and USB connection you are using. 

Additionally, there are several possible workarounds:

1) Create several smaller containers instead of the single large one.

2) Create Dynamic container (for NTFS-formatted drives)

3) Create container with 'Randomize disk space in the background' option (for NTFS-formatted drives) .
4) Use BestCrypt Volume Encryption software to encrypt the whole disk.

See the User Manual article: Create Container