@Carl Love 

Thanks, Carl. That looks like just what the doctor ordered. --Edwin

Thanks, Acer, that seems to work. --Edwin

Thanks, Acer, that seems to work. --Edwin

Thanks, Alec.  I missed those fonts. Next time I guess I better look throught all of the palettes.

I did look at the palette "Diacritical Marks", but couldn't figure out how to use it to put an accent over a letter. 

--Edwin

PS where did you get the  "uum Ctrl+Space" from?

Thanks, Alec.  I missed those fonts. Next time I guess I better look throught all of the palettes.

I did look at the palette "Diacritical Marks", but couldn't figure out how to use it to put an accent over a letter. 

--Edwin

PS where did you get the  "uum Ctrl+Space" from?

That's fantastic! Thanks a lot!

--Edwin

That's fantastic! Thanks a lot!

--Edwin

Thanks, Georgios, that  works!.

I am not using a laptop. But I was using numbers on the top row of the keyboard without success. 

But as hard as I look I cannot find that documented anywhere. You would think that Maple would make it easier to use umlauts.

Googling I see that the method you gave (as well as similar codes for other accented letters) works for any Window's word processors apparently.   I will put the URL here in case others come looking:

                                    http://www.csusm.edu/akundgen/umlaut.html

Edwin

Thanks, Georgios, that  works!.

I am not using a laptop. But I was using numbers on the top row of the keyboard without success. 

But as hard as I look I cannot find that documented anywhere. You would think that Maple would make it easier to use umlauts.

Googling I see that the method you gave (as well as similar codes for other accented letters) works for any Window's word processors apparently.   I will put the URL here in case others come looking:

                                    http://www.csusm.edu/akundgen/umlaut.html

Edwin

Efharisto!, but that doesn't work for me in either text mode or 2 d math mode. I get nothing when I follow you directions.

Efharisto!, but that doesn't work for me in either text mode or 2 d math mode. I get nothing when I follow you directions.

Efharisto!, but that doesn't work for me in either text mode or 2 d math mode. I get nothing when I follow you directions.

Efharisto!, but that doesn't work for me in either text mode or 2 d math mode. I get nothing when I follow you directions.

Thanks, Acer.

I was curious as to why I got a different error message with input type checking when I used try ,catch  print(lasterror). I see that other methods will do the trick including your suggestion:

WARNING(StringTools:-FormatMessage(lastexception[2..-1]));

When I use error alone it stops the loop and doesn't continue to process additional values. Example:

>F:=proc(LL::{set(list(integer)), list(list(integer))})
LL;
end proc:
>for B in [{[1,2]}, {[1,1/2]}, {[1,2,3]}] do
try
print(F(B));
catch:
error;
end try:
od:

  {[1, 2]}

Error, invalid input: F expects its 1st argument, LL, to be of type {set(list(integer)), list(list(integer))}, but received {[1, 1/2]}
 

Compare that to the following which completes the loop:

>for B in [{[1,2]}, {[1,1/2]}, {[1,2,3]}] do
try
print(F(B));
catch:
WARNING(StringTools:-FormatMessage(lastexception[2..-1]));
end try:
od:

                                  {[1, 2]}

Warning, invalid input: F expects its 1st argument, LL, to be of type {set(list(integer)), list(list(integer))}, but received {[1, 1/2]}

                                 {[1, 2, 3]}