Wrote

When you are trying to calculate the last expression the maple() function takes the following expression (see mvr5\mvr5.txt):

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07.06.2013 23:02:12 [->] solve({(0=(77/10000*ln({((77/10000+772893421/100000000000000*t*715*cos({(Pi/4)}))/77/10000)}))/772893421/100000000000000)},t)
07.06.2013 23:02:12 [->] C:\Temp\tmp1B5E.tmp:
interface(quiet=true);
with(linalg):with(inttrans):with(plots):

writeto("C:\\Temp\\tmp1B5F.tmp"):
smath_line := proc() local i: for i from 1 to nargs - 2 do args[i]; od: end:
smath_sum := proc() if nargs = 1 then sum( args[1] ); elif nargs = 2 then sum( args[1], args[2] ); elif nargs = 4 then sum( args[1], args[2] = args[3] .. args[4] ); fi: end:
smath_product:= proc() if nargs = 1 then product( args[1] ); elif nargs = 2 then product( args[1], args[2] ); elif nargs = 4 then product( args[1], args[2] = args[3] .. args[4] ); fi: end:
smath_int := proc() if nargs = 2 then int( args[1], args[2] ); elif nargs = 4 then int( args[1], args[2] = args[3] .. args[4] ); fi: end:
smath_diff := proc() if nargs = 2 then diff( args[1], args[2] ); elif nargs = 3 then diff( args[1], args[2] $ args[3] ); fi: end:
smath_sys := proc() { args[i] $ i = 1 .. nargs - 2 }; end:
smath_el := proc() args[1][ args[2] ]; end:
smath_mat := proc()
local i, j, out:
out := [ args[j] $ j = 1 .. args[ nargs ] ]:
for i from 2 to args[ nargs - 1 ] do
out := out, [ args[j] $ j = ( i - 1 ) * args[ nargs ] + 1 .. ( i - 1 ) * args[ nargs ] + args[ nargs ] ]:
od:
convert( [ out ], array );
end:
smath_submatrix := proc() submatrix( args[1], args[2] .. args[3], args[4] .. args[5] ); end:
ans := \
solve(((0=(77/10000*ln((((77/10000+772893421/100000000000000*t*715*cos\
(((Pi/4))))/77/10000))))/772893421/100000000000000)),t):
if ( whattype( ans ) = `exprseq` ) then
convert( convert( cat( `mat(`, substring( convert( [ans], string ), 2..-2 ), `,`, nops( [ans] ), `,1)` ), string ), symbol );
elif ( whattype( ans ) = `set` ) then
convert( convert( cat(`mat(`,substring(convert(map2(op,2,[ans[i]$i=1..nops(ans)]),string),2..-2),`,`,nops(ans),`,1)`), string ), symbol );
elif ( whattype( ans ) = `symbol` ) then
convert( convert( eval( ans ), string ), symbol );
elif ( whattype( ans ) = `series` ) then
convert( convert( ans, polynom) , symbol );
elif ( whattype( ans ) = `string` ) then
convert( ans, symbol );
else
convert( convert( ans, string ), symbol ); fi;
quit:

07.06.2013 23:02:12 [<-] C:\Temp\tmp1B5F.tmp:
1399999986000000000/10047614473*2^(1/2)
07.06.2013 23:02:12 [<-] 1399999986000000000/10047614473*2^(1/2)

As you can see: solve({(0=, but you expected solve({(x=. That's the difference. The solve() function solves another equation.

Wrote

The problem in the fractional representation of the numbers.

Thank you for the bright and complete answer.

The best regards

Wrote

I am not able to reproduce the maple plot examples in 4909 any more. maple() runs as usual, just the maple plot region seems to have problems to produce the image files. The temporary files mentioned in the log file are created but empty.

Citazione

SMath crashes when I try to access the context menu of a maple region. The contents of the error message is attached. Using SMath 4909.