symbolic for (each) loop error

Forum|Forum|9 years ago
September 21, 2016
2 replies
3144 views

Using the for programming expression in "for each" mode is a useful mode when iterating over an array and the index of an element is not a concern. The mode works under the numeric processor when used in a free-standing program and inside a function.

However, when using the symbolic processor, the mode only works in a free-standing program and not in a function (where it is much more useful).

This is a long standing error in Mathcad. Has it been fixed in Prime? Can it be fixed in the next Mathcad 15 update?

Stuart

1_error---16-09-21-symbolic-for-each-loop-error-01-xmcd.zip

Physics

Best answer by Werner_E

It doesn't even work if the matrix is freshly defined inside the program

And, no - the bug wasn't fixed in Prime, at least not in Prime 3.0

Obviously a for-loop is interpreted/implemented differently in the symbolics and insist on a sequence like first value, (optional second. value) and end value.

Did the symbolic eval work in MC11 with Maple?

Werner

W

Werner_E

Answer

25-Diamond I

It doesn't even work if the matrix is freshly defined inside the program

And, no - the bug wasn't fixed in Prime, at least not in Prime 3.0

Obviously a for-loop is interpreted/implemented differently in the symbolics and insist on a sequence like first value, (optional second. value) and end value.

Did the symbolic eval work in MC11 with Maple?

Werner

W

Werner_E

25-Diamond I

Now I am further puzzled:

Mathcad 15 M030:

Prime 3.0

Prime was set to "English" using "/culture:en-US" but the error message still is in German. Something like "Object reference not set to an object instance".

Werner