Here is an example without assumptions that should return false for complex numbers (IMO)

prp := cos(z)/abs(cos(z)) - abs(cos(z))/cos(z) = 0:
is(prp);
                              true

For comparision: simplify requires restriction to the real domain

simplify(prp);
(simplify(prp) assuming real);
                          2                    
                 -|cos(z)|  sec(z) + cos(z)    
                 -------------------------- = 0
                          |cos(z)|             

                             0 = 0

This only makes sense if is(...) assumes real or I am wrong with complex numbers and simplify should simplify this expression without assumptions.

I want to report a bug.

This was possible in MaplePrimes but I cannot find the option software change request (if i remember correctly) any more. Hast this option moved or been removed?

The document block (copied from a larger document) in the attached file could be executed with Maple 2022 (in the larger document).

Maple 2023 evaluates... that I have to interrupt.

On my installation I cannot convert the block to 1d input to investigate for hidden characters. This works in 2022.

Trying to manipulate (splitting, cutting, ...) the block lead several times to the 2023 GUI not responding normally which required Maple restart.

What I found with Maple 2022 and lprint: There is a ndash character here

which must be deleted in the attached file. The larger document does not lprint a ndash. So this might be a copy/paste artefact and is perhaps unrelated to the evaluation problem with 2023.

With Maple 2023 there is no ndash but the output looks different

The whole thing is perhaps related to this

Can someone reproduce and/or help?

Download plot3d_in_2023_not_working.mw

Modal Analysis is a very usefull feature. Only the animation window is sometimes too tiny.

How to enlarge this view and to pause the animation?

This seems to be a Maple plot window (a "Rotate the view" cursor is visible and the animation can be rotated). Are there any short cuts or functions keys to toggle plot view options?

Edit: Looks to my like a Maplet. Maybe a Maplet programmer can tell if that (what I am asking) is possible

Both, Maple and MapleSim in Versions from 2021 to 2023 do not start. A logfile is saved which starts as

# A fatal error has been detected by the Java Runtime Environment:

#

#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x0000000000000000, pid=17256, tid=10520

#

# JRE version: OpenJDK Runtime Environment Temurin-19.0.1+10 (19.0.1+10) (build 19.0.1+10)

# Java VM: OpenJDK 64-Bit Server VM Temurin-19.0.1+10 (19.0.1+10, mixed mode, tiered, compressed oops, compressed class ptrs, g1 gc, windows-amd64)

# Problematic frame:

# C  0x0000000000000000

#

This only occurs when the notebook (on which the error occurs) is connected to the domain network. If the notebook is not connected, Maple and MapleSim can be started and will continue to run when the network is reconnected.

Has anybody seen this before or any ideas what this could be?

Edit: This all happened under Windows 10 on a notebook that has been running Maple for 3 years and only recently displayed this error.

Edit2: Connection via an USB doc which also connects to an external monitor.