Before we dive into the solutions, let's explore the possible causes of the error:

The RMN60 error typically appears shortly after launching the game, often before the main menu loads. The message may read: “Fatal Error: RMN60 – Unable to create depth render target – Not enough video memory.”

The original game is broken on modern PCs. The easiest fix is to install the and GTA IV Update 7 (1.0.7.0) if you have the retail or Rockstar Launcher version. For Steam users, right-click GTA IV → Properties → Betas → select “1.0.7.0” from the dropdown. Alternatively, install DXVK (translates DirectX 9 to Vulkan), which bypasses the faulty DirectX 9 renderer entirely. Download dxvk.dll and dxgi.dll and place them in the GTA IV root folder.

Fixing GTA 4 Fatal Error RMN60: Complete Troubleshooting Guide

Specifically, RMN60 occurs when the game’s DirectX 9 driver cannot allocate a “depth render target” — a temporary memory buffer used for 3D rendering. This failure is often triggered by the game detecting less available video memory than it actually needs, due to a well-known or a driver reporting VRAM incorrectly to older titles.