Help Not Building on iOS and collisions issue

[Rohaan081622]

Shooting in the dark here, but could it be that you've set up Unity's emitter to simulate in local space instead of world space? that way if you rotate or move the emitter, particles will rotate/move with it which is probably not what you want. Here's my setup for the SimpleFluid sample scene:

Thank you for your help but i have another problem now apart from these. The simple2dshader is not there in the 5.1 and ive tried to put them in from the newer version and it has an error. See the picture below. In terms of particles, i am working on a 3d project but for mobile i've been using simple2dwater. and the particle system does not show. I can screen share if you want but cant show the picture here as i am bound by the agreement. sorry