MEL script rigid bodys?

[Anonymous]

Hi all. I am new in scripting, but I wanted to move center of Mass on all my rigid body objects with MEL script, but it fails to execute. Please help me to find the mistake.

for ($i = 1; $i <= 100; $i++)
{
setAttr "rigidBody$i.centerOfMassY" -7.131;
setAttr "rigidBody$i.centerOfMassZ" -6.28;
};

// Error: line 3: setAttr: No object matches name: rigidBody$i.centerOfMassY // 

How can I make MEL understand that $i is a number?

[Anonymous]

setAttr ("rigidBody" + $i + ".centerOfMassY") -7.131;

[Anonymous]

setAttr ("rigidBody" + $i " ".centerOfMassY") -7.131;

Thanks THNKR, but now there are new errors...

for ($i = 74; $i <= 141; $i++)                         //line 1
{                                                      
setAttr ("rigidBody" + $i " ".centerOfMassY") -7.131;  
setAttr ("rigidBody" + $i " ".centerOfMassZ") -6.28;   
};                                                     
                                                       //line 6

// Error: setAttr ("rigidBody" + $i " ".centerOfMassY") -7.131;  
 // 
// Error: Line 3.29: Syntax error // 
// Error:  // 
// Error: Line 6.0: Syntax error // 

[Anonymous]

Fixed a typo

[Anonymous]

Thank you, THNKR! it worked!