Problem rendering two PrintABloks side by side

PrintABlokExtensionTest.scad

//
// Expansion set for PrinkABlok
// by Scott Leslie (@tinkerology)
// Sample STLs can be found at:
//    
//
// PrintABlok by Joe Larson
// Based on : https://www.thingiverse.com/thing:4171518
//
// License: Creative Commons Attribution Non-Commercial
//

// Read in the STL for Print-A-Blok
module constructPrintABlok()
{
    import("Printablok-1BaseBlok.stl", convexity=3);
}

constructPrintABlok();
translate([16,0,0])
constructPrintABlok();