Reloading a script in QlikView 12 fails with "ApplyMap error: map_id not found" error. "ApplyMap error: map_id not found" error.

Reloading a script in QlikView 12 fails with "ApplyMap error: map_id not found" error. "ApplyMap error: map_id not found" error. 

When you try to reload the same script in QlikView 11 the reload succeed and you don't get any error (of course even if the reload succeed the ApplyMap() function is not applied and the Country field is empty).
 

// Load mapping table of country codes:
//map1:
//mapping LOAD * 
//Inline [
//CCode, Country
//Sw, Sweden
//Dk, Denmark
//No, Norway
//] ;
// Load list of salesmen, mapping country code to country
// If the country code is not in the mapping table, put Rest of the world
Salespersons:
LOAD *, 
ApplyMap('map1', CCode,'Rest of the world') As Country 
Inline [
CCode, Salesperson 
Sw, John
Sw, Mary
Sw, Per 
Dk, Preben
Dk, Olle
No, Ole 
Sf, Risttu] ;
// We don't need the CCode anymore
Drop Field 'CCode';

Environment: 

The cause of the reload failing is because there is no mapping table loaded before the ApplyMap() function is used.

This is an intentional change made by R&D in QV 12.10 SR6 and above to firm up the behavior of ApplyMap() . 
The requirements  are to make sure to have a Mapping table loaded, the table must be a true MAPPING table and the reference to the mapping table must be a single quoted string.  

Please refer to QV-11192 Apply Mapping that worked in 11.20 is not working in 12.10

In versions of 12.10 previous to SR6,  all versions of 12.0 and QlikView 11, the reload doesn't fail.  

The only way to avoid this error to occur in QlikView 12 is to make sure that there is a mapping table already loaded before using the ApplyMap() function.