Replaced Ã-Device with VCCS_Limit1 which created based on your description in this post. Now can run this simulation in about 1 seconds.
VCCS with limter? - QSPICE - Qorvo Tech Forum
There is a fundamental different of the VCCS in your previous post and MULTGMAMP Ã-Device. MULTGMAMP Ã-Device Iout return through VDD/VSS instead of GND (0 node). This can introduce a fundamental different in the circuit when you replace Simetrix VCCS with a MULTGMAMP Ã-Device.
In addition, you added 4 text description in schematic but forgot to comment them, where simulation won’t run after unzip your circuit.
1. 2 stage simple amp model with slew rate 2V/uS and
2. Voltage Feedback Network for constant voltage at DUT
3. DUT Load
4. Gain = 3