Hello everyone. I downloaded the "great Indian Railways sound package version 1" from this link: http://www.indianrailwaysimulator.com/sound.html
As given in the readme file,I copied the sound files into the main SOUND folder under MSTS main folder and then replaced the sms files for all IR passenger cars as given in the readme file and also copied the files into the SOUND folder for those coaches. The sounds worked for all routes except the NORTHEAST CORRIDOR route, for which the message "failed to find sms file,name(null)" was displayed on the screen. So I again copied all the sound files and pasted them in the SOUND folder of that particular route also. This time, the game worked(I'm talking about the above route,the game worked for all other routes with the sound files copied) but after 1/2 a minute or so,the game got automatically closed(is it called 'crashed').I am totally confused now.Please help me out people.