Access Denied Error Java Noob

Hello Everyone. So I'm getting an access error denied for my code, from what I can tell by looking at other threads its how I'm saving the output file. I'm using imageJ and to make a macro I have to use java. This is basically an example macro I pulled off the internet. Essentially when I run the plugin "iterative PIV' it outputs a .txt file, and I think when I go to the new loop I try to reuse the filename or something. So if I change the filename for each loop would that work? Also I'm not sure how to do that, I'm only experienced really in matlab.

id0 = getImageID();

slices = nSlices;

Dialog.create("Multi-slice PIV");

Dialog.addNumber("Interrogation window 1", 128);

Dialog.addNumber("search window 1", 256);

Dialog.addNumber("vector spacing 1", 64);

Dialog.addNumber("Interrogation window 2", 64);

Dialog.addNumber("search window 2", 128);

Dialog.addNumber("vector spacing 2", 32);

Dialog.addNumber("Interrogation window 3", 32);

Dialog.addNumber("search window 3", 64);

Dialog.addNumber("vector spacing 3", 16);

Dialog.addNumber("correlation threshold", 0.8);

Dialog.show;

piv1 = Dialog.getNumber();

sw1 = Dialog.getNumber();

vs1 = Dialog.getNumber();

piv2 = Dialog.getNumber();

sw2 = Dialog.getNumber();

vs2 = Dialog.getNumber();

piv3 = Dialog.getNumber();

sw3 = Dialog.getNumber();

vs3 = Dialog.getNumber();

corr = Dialog.getNumber();

path = getDirectory("Select Output Folder");

setBatchMode(false);

for(s=1;s<slices;s++){

run("Duplicate...", "title=[seq_"+s+"] duplicate range="+s+"-"+s+1+"");

run("iterative PIV(Cross-correlation)...", " piv1="+piv1+" sw1="+sw1+" vs1="+vs1+" piv2="+piv2+" sw2="+sw2+" vs2="+vs2+" piv3="+piv3+" sw3="+sw3+" vs3="+vs3+" correlation="+corr+" batch path=["+path+"]");

for(n=1;n<nImages;n++){

selectImage(n);

if(n!=id0)close();

}

}