ERROR [MNL0019] 'U3.7' is tied to nets '+5V(1)' and 'BAT PWR CHK'.
ERROR [MNL0019] 'U3.1' is tied to nets 'VSS' and 'MCLR1'.
ERROR [MNL0023] 2 errors found in file.
ERROR [NET0011] Netlist failed or may be unusable.
[MNL0019] means
This error message appears when there is a conflict between an existing part reference value for a net with another net. To solve this error, make sure that the part reference value for a net is unique.
If you fix this error then all the errors will vanish.
if possible post your schematic here, i can help you in depth.