How to run two loops by iMacros?

Question

I'm on Firefox 55.0.2 (64-bit), iMacros 9.0.3, Windows10 x64.

I'm trying to get all HREFs from all website pages and fail on two loops.

However, the looping works, but after every founded link, the URL is reloaded. This is my iMacro code:

VERSION BUILD=9030808 RECORDER=FX
SET !ERRORIGNORE YES
TAB T=1

SET !DATASOURCE links.csv 
SET !DATASOURCE_COLUMNS 1
SET !LOOP 1
SET !DATASOURCE_LINE {{!LOOP}}
URL GOTO={{!COL1}}
WAIT SECONDS=15

TAG XPATH="(//body//a)[{{!LOOP}}]" EXTRACT=HREF

ADD !EXTRACT {{!URLCURRENT}}

SAVEAS TYPE=EXTRACT FOLDER=* FILE=links.csv

Then I tried it another way, with this code related to this answer https://stackoverflow.com/a/18435002/1992004.

var macro;
macro =  "CODE:";
macro +=  "VERSION BUILD=9030808" + "\n"; 
macro +=  "TAB T=1" + "\n"; 
macro +=  "SET !ERRORIGNORE YES" + "\n"; 
macro +=  "SET !EXTRACT_TEST_POPUP NO" + "\n"; 
macro +=  "SET !DATASOURCE links.csv" + "\n";
macro +=  "SET !DATASOURCE_COLUMNS 1 " + "\n";
macro +=  "SET !LOOP 1" + "\n"; 
macro +=  "SET !DATASOURCE_LINE {{i}}" + "\n"; 
macro +=  "URL GOTO={{!COL1}} " + "\n"; 
macro +=  "WAIT SECONDS=15" + "\n"; 

var macro1;
macro1 =  "CODE:";
macro1 +=  "TAG POS={{n}} TYPE=A ATTR=HREF:* EXTRACT=HREF" + "\n"; 
macro1 +=  "SAVEAS TYPE=EXTRACT FOLDER=* FILE=links.csv" + "\n"; 

for (var i=1;i<20;i++)
{
iimSet("i",i)
iimPlay(macro)

var n=1;

while(true)
{
iimSet("n",n)

var ret=iimPlay(macro1);

if(ret<0)
{
break;
}

n++;
}

}

I saved the last code as .iim and .js:

• In the case of .iim I get an error MacroSyntaxError: unknown command: VAR, line 1 (Error code: -910).
• In the case of .js, I get the error The LOOP button can only be used with macro (".iim") files. In a Javascript (".js") file, you can use Javascript itself for loops..

What would be the correct code to get both loops to work?

@Shugar @macroscripts @chivracq do you probably have a hint for me?