
#include nagmk26.h

On entry,  ${\mathbf{m2}}<1$, 
or  ${\mathbf{n2}}<1$, 
or  ${\mathbf{m1}}<1$, 
or  ${\mathbf{m1}}>{\mathbf{m2}}$, 
or  ${\mathbf{n1}}<1$, 
or  ${\mathbf{n1}}>{\mathbf{n2}}$, 
or  ${\mathbf{ldm}}<{\mathbf{m2}}$. 
On entry,  order is not 'A' or 'D'. 