Hi. I’m a beginner at Mel Script. And I’m not an English speaker, so I’m not good at English. I’m sorry in advance!
I want to take care of a lot of things at once.
For example, it’s like this.
string $fileList[] = `ls -type "file"`;
for ($file in $fileList){
setAttr ($file + ".ignoreColorSpaceFileRules") 1;
}
Which script should be applied to unselect ‘Lock Fresh IOR To Reflection IOR’ in multiple vray shading node properties?
I think I should use “setAttr”, but I can’t because I’m using a similar code. 
Thank you in advance. 
Below are the codes I’ve tried.
vray("getRequiredAttrs", "lockFresnelIORToRefractionIOR" 0;);
string $filelist[] = `ls -sl -force "vray"`;
for ($filelist in $file){
setAttr ($filelist + ".lockFresnelIORToRefractionIOR") 0;
};
string $material[] = `ls -force "vray"`;
for ($material in $vray){
setAttr ($vray + ".lockFresnelIORToRefractionIOR") 0;
};
string $material[] = `ls -materials "VRayMtl"`;
for ($material in $VRayMtl){
setAttr ($VRayMtl + ".vraylockFresnelIORToRefractionIOR") 0;
};
setAttr "VRayMtl1.lockFresnelIORToRefractionIOR" 0;
setAttr "VRayMtl1.bumpMapType" 1;
string $VRayMtl[] = `ls -materials "VRayMtl"`;
for ($VRayMtl in $Reflection){
setAttr ($Reflection + ".vraylockFresnelIORToRefractionIOR") 0;
};
// Error: for ($VRayMtl in $Reflection){
//
// Error: Line 2.29: "$Reflection" is an undeclared variable. //
// Error: setAttr ($Reflection + ".vraylockFresnelIORToRefractionIOR") 0;
//
// Error: Line 4.30: "$Reflection" is an undeclared variable. //
string $VRayMtl[] = `ls -materials "VRayMtl"`;
for ($VRayMtl in $Reflection){
setAttr ($VRayMtl + ".vraylockFresnelIORToRefractionIOR") 0;
};
string $checkior[] = `ls -mat "VRayMtl"`;
for ($checkior in $Reflection){
setAttr ($VRayMtl + ".vraylockFresnelIORToRefractionIOR") 0;
};