I am trying to run the application "The Cosmic Travel Planner" by Christian Bar (CBaer), uploaded on August 21, 2013 on Maple cloud (Mobius@admin). I use the left panel of GUI where "MapleCloud" is opened. While opening the application GUI asks my permission for running some code automatically. After my 'YES' Maple gives me an error:

Startup Code Error
0, "permission denied: no read access (%1)", "C:\Users\Andriy\MapleLib"

I tried to give the permission to folder "C:\Users\Andriy\MapleLib" however unsuccessfuly.

OS: Win 8

Could you help me with this Error? Thank you.

An elementary example of successful using Threads:

Hi. I have two problems connected to Physics package and complex numbers. The main problem is undesired decomposition of a complex value t into Re(t)+I*Im(t).

It seems that empty symbol is redefined (overloaded) in Physics package:

Code:

restart; 
with(Physics):
a := ``;

Result:

Hi.
I am trying to use a new Physics:-Library:-SortProducts command. However it doesn't work in my case.

restart; 
with(Physics); 
with(Library); 
Setup(mathematicalnotation = true); 
Physics:-Setup(anticommutativeprefix = psi); 

for i to 4 do 
ap[i] := Creation(psi, i, notation = explicit); 
am[i] := Annihilation(psi, i, notation = explicit) 
end do; 

z := A*ap[2].am[2].ap[1].am[1]+B*ap[1].am[1].ap[2].am[2]+C*ap[3].am[3].ap[4].am[4]: