Game crashes while using roadvehicles

[Mr Pepperoni]

Since I loaded alpha 58 on my Computer (One-way roads on) the game will always crash after a while, if I start building road vehicle routes. As long as I use Trains the game is going save. The crach-log always says the same:

TTD V0019EE00 Crash Log by TTDPatch 2.0.1 alpha 58 (Windows)

Exception C000001D at 001B:0061AB82

Windows says there is a problem with "TTDLOADW.OVL". It's a quite strange thing. Does anybody have the same problem and what could be wrong?
The first time this Problem occured during a network game. I prefere building trains, but my friend preferes Road vehicles. After 20 Minutes playing the game suddenly broke down. When we backed up the game, the game crashed exactly at the same position. I suppose it could be a problem with my memory on my computer. After testing the game a few times with using only roadvehicles and using only trains, I realised the game would only crash, if a human player started building roadvehicles. If a human player is building only trains, and the AI is using roadvehicles the game is running savely.

Mr Pepperoni

[Patchman]

This is a bug in a .grf file; the last line of the crash log should indicate which file it is.

Download an updated version of that file if it is available.