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FLUID CAVITY HELP

manz_0's picture

I am modelling an inflated sphere. The sphere is composed off two circular planar membranes joined together at the boundries. 
I have modelled the inside of the sphere as a fluid cavity and will inflate it to its threshold limit. 

I have achieved this by using the fluid cavity and fluid inflator method but for some reason when I run my input file I receive the following message: 

 ***ERROR: THE FLUID INFLATOR ACTIVATION HAS BEEN SPECIFIED ON THE FLUID 
           INFLATOR ASSEMBLY_CAVITYINFLATION. THIS FLUID INFLATOR HAS NOT BEEN 
           DEFINED IN THE MODEL. IF A PART INSTANCE IS USED IN THE CURRENT 
           MODEL, PLEASE CHECK THE NAME OF PART INSTANCE FOR THE FLUID 
           INFLATOR. IF YOU USE THE KEYWORD FLUID INFLATOR INTERACTION WITH 
           PART INSTANCE, PLEASE USE THE KEYWORD FLUID INFLATOR ACTIVATION 
           INSTEAD. 

I am not quite sure how I can overcome this as I have defined my fluid cavity in the *instance section of the code and I am defining the fluid inflator activation in the *step section of the code. 

Any help or advice would be much appreciated, thanks for looking :)

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