Filament unloaded before support is printed

[Shell]

Hello,
Context: using Simplify3D 2.1 to print model with dual head (LeapFrog Xeed).
Front Extruder (T0) loaded with ABS to print support,
Back Extruder (T1) loaded with PLA to print the model.
Model GCode generated by Simplify3D is attached.

1. Printing starts fine, raft is printed and first layer starts OK. As soon as model in first layer is finished, filament (T1) gets unloaded for some reason ?!
2. Printing is not finished, and support printing (T0) begins. However, after layer is completed, extruder freezes and starts pouring filament. Like 5 mm wide blob is dropped on the model (see attachment, yellow blob on the right).
3. Second layer starts, but printing fails because T1 filament has been unloaded before.

Is there something wrong with the GCode?

[KeyboardWarrior]

Hello,
Context: using Simplify3D 2.1 to print model with dual head (LeapFrog Xeed).
Front Extruder (T0) loaded with ABS to print support,
Back Extruder (T1) loaded with PLA to print the model.
Model GCode generated by Simplify3D is attached.

1. Printing starts fine, raft is printed and first layer starts OK. As soon as model in first layer is finished, filament (T1) gets unloaded for some reason ?!
2. Printing is not finished, and support printing (T0) begins. However, after layer is completed, extruder freezes and starts pouring filament. Like 5 mm wide blob is dropped on the model (see attachment, yellow blob on the right).
3. Second layer starts, but printing fails because T1 filament has been unloaded before.

Is there something wrong with the GCode?

Looks like you've disabled G92 E0's from happening. If G92 E0 commands don't agree with your printer, you can use Relative Extrusion Distances (the option right above disable G92 E0's).