so just bear with me.
I very much doubt that a problem with the help databases on the OrthogonalExpansions package could be causing any problems, but I admire your wish to keep your Maple installation as "clean" as possible, so maybe this should be fixed.
I apologise in advance if anywhere in the following I am "stating the obvious"
The message you are getting ie
"Converting C:\\Program Files\\Maple 2018\\lib\\OrthogonalExpansions.hdb to C:\\Program Files\\Maple 2018\\lib\\OrthogonalExpansions.help"
Error, (in HelpTools:-HelpCall) cannot create help database: 'unable to open database file"
suggests(?) a "privilege" problem. Solution is
- Start Maple with "admiinstrator" privilege
- Right-click on the desktop Maple icon or the .exe file in the Maple2018 directory - however you "normally" start Maple - and from the resulting pop-up, select "Run as Administrator"
- You should get the same warning message
- Now execute the HelpTools:-Database:-ConvertAll() command
- If this works, fine: shut down Maple and restart normally
- If it doesn't, get back to me
As I said earlier, I actually doubt if this "help database" problem is causing issues with your PDE. Much more likely is the version of the Physics package which you have installed. The Physics package uses a lot of PDE stuff, and upgrades to the former often result in upgrades to the latter. If I execute the command
on my Maple 2018 installation, it returns (I have highlighted the relevant version numbers)
"C:\Users\TomLeslie\maple\toolbox\2018\Physics Updates\lib\Physics Updates.maple", `2019, March 14, 23:22 hours, version in the MapleCloud: 355, version installed in this computer: 326.`
If you execute the same command, which version of the Physics package updates do you have? Note down/emember your numbers for later
Since the Maple worksheet I originally provided works in Maple 2018, I have to assume that (maybe?!) one needs at least the Physics update 326. Since I am currently using Maple 2019 as my default, I don't normally do updates on prior versions - but the process is as follows:
- In the upper right corner of your Maple window, there is a "cloud" icon: click it; you should get a pop-up
- pause for a few seconds, because Maple has to go check whether or not "updates" are available: after a few secs you *ought* to get a "red" indicator above the "Updates" icon in this popup
- Assuming you do get this indication that updates are available, then click the "Updates" icon in this pop-up. This *ought* t open another window identifying which "packages" you have installed and whether or not any updates are available for these packages. The line entry "Physics Updates" in this new window *ought* to show an orange "Update" field
- Click this update field and wait for the installation to complete
- Shut down Maple and restart it
- Execute the Physics:-Version() command again to verify whether or not an updated version has been installed
- If this confirms a new Physics version, then re-run my original worksheet to see what happens