
In many instances, out-of-place error messages, usually for missing files, will cause a highly undesired crash at the wrong time. The game is also notoriously unstable with unusually high tendencies to hang, crash without giving reason, and display error messages incorrectly and/or at the wrong times. There are also issues with the signalling and AI dispatching. For example the "front coupling bug", where the locomotive's front coupler would not work, the "white void bug", where the route scenery disappears, leaving a white void, and the "end-of-the-line bug", where the locomotive, if it crashes through the last buffers on the route, would fall into an empty void.


The original version contained many bugs. Users could also create activities for any route, create custom cabviews, or edit the default ones. Included with the game was the Editors & Tools program, which allowed the user to build custom routes.

Microsoft Train Simulator (sometimes referred to as MSTS) is a train simulator for Microsoft Windows, released in July 2001 and developed by UK based Kuju Entertainment, and is available for purchase through. Big and complicated maps requires 1 GHz+ processor, 512 MB or more RAM, and 64MB or better video card to run. Requirements will change depending on the active map. Microsoft Windows 95/98/Me/2000/XP, 266 MHz CPU, 32 MB of RAM for Win 95/98/Me 64 MB for Win 2000/XP, 500 MB of HD space minimum (1.5 GB for full install), CD-ROM drive, DirectX 7.0a or later compatible 4 MB video card. For other uses, see Train Simulator (disambiguation). This article is about the train simulator published by Microsoft.
