[Bug Report] 3D Simulation fails to transition from Stage 0 to Stage 1 - Works in 2D

[jiawei6688]

Description Hello Anura3D team,

I am encountering a critical issue when running a 3D Slope Stability simulation. I have set up a model that works perfectly in 2D (plane strain) with specific Stage 0 settings. However, when I apply the exact same settings to a 3D model, the calculation stops immediately after Stage 0 and fails to start Stage 1.

Simulation Setup (The "Standard" Settings)
Model: 3D Slope / Soil-Water-Structure interaction.
Stage 0 (Gravity Loading):
Number of steps: 1
Time per step: 0.5 s
Quasi-static Convergence: Applied (YES)
Stage 1 (Rainfall/Loading):
Standard rainfall phase.

The Problem
Stage 0 finishes correctly: The log shows "Calculation finished" and generates .slope_example3d.BRF_001
Stage 1 fails to start: GiD stops automatic execution.

Observations It seems that when Quasi-static Convergence is enabled in 3D with , the generated restart information or the Stage 1 input file (CPS) becomes unreadable for the kernel.Steps=1

In 2D: This exact setup (1 step, 0.5s, QS applied) transitions to Stage 1 without any issues.
In 3D: It fails consistently with the "end-of-file" error.
Expected Behavior The 3D calculation should handle the Quasi-static convergence transition automatically, just like the 2D version does, reading the restart file and continuing to Stage 1.

Environment
OS: Windows 10/11
Kernel: Anura3D_2025 (Kernel version: 2021.1.0)
GiD: 17







.0 (Official)

[jiawei6688]

Here's some additional information about the files generated by GID.