Ame Brother Printer

Hi Ame Followed the lead you gave ,and ended up with some very interesting results
1 ran lsusb - Brother printer appears ,Noted the description ,and ID
2 Re- installed the recommended drivers
3 opened/lib/udev/rules.d/40-libsane.rules
and entered the required information concerning the brother printer ,and ID etc
4 Tested the scanner , message came up - no device available
so i put into terminal sudo su then password ,and then xsane ,the scanner worked
5 tried the printer- wouldnt work
gave up for the night .But this morning i tried scanner again wont work ,put in the command line ,still no work
Then decided to try the printer ,Much to my delight ,it works ,so i will leave it like that at the moment ,until i can find out why the scanner wont work .
Have you any ideas about this problem.
The last time i had anything to do with writing a program was over 30 years ago -Dbase2 Things have changed so much since then ,takes me all my time to operate the computer now
It was an accounting program ,for public accountants,worked very well
Cheers
Kevin

Kevin and Perlita Morgan;330898 wrote: Hi Ame Followed the lead you gave ,and ended up with some very interesting results
1 ran lsusb - Brother printer appears ,Noted the description ,and ID
2 Re- installed the recommended drivers
3 opened/lib/udev/rules.d/40-libsane.rules
and entered the required information concerning the brother printer ,and ID etc
4 Tested the scanner , message came up - no device available
so i put into terminal sudo su then password ,and then xsane ,the scanner worked
5 tried the printer- wouldnt work
gave up for the night .But this morning i tried scanner again wont work ,put in the command line ,still no work
Then decided to try the printer ,Much to my delight ,it works ,so i will leave it like that at the moment ,until i can find out why the scanner wont work .
Have you any ideas about this problem.
The last time i had anything to do with writing a program was over 30 years ago -Dbase2 Things have changed so much since then ,takes me all my time to operate the computer now
It was an accounting program ,for public accountants,worked very well
Cheers
Kevin

Hi,

It sounds like a permissions problem on the scanner device. There are two things to remember here:

1) su logs you in with root privileges, i.e. permission to do everything
2) it might be necessary to add your regular user account to a certain group to have permission to access the scanner or printer device. The driver installation might do this automatically, *but* adding a user to a group does not take effect until you log out and log in again. Shutting down the PC will achieve this.

So, you have demonstrated that both parts of the unit work. Now you just have to get them to work consistently. Persevere.

I don't know anything about this specific model. In fact I don't own a scanner or a printer.

Regarding the Solver, I suggest that if you have only a few variables or constraints a simple program would be better, since you will understand it. If you are even casually interested I suggest you look at Python as the simple and obvious language of choice. I am not sure it's a good idea to rely on the Solver in Excel as it is essentially a 'black box'. Plus, you have to pay for Excel to be allowed to use it.

A

+1 for Python, but I see this little post that may be worth a squiz. Additionally there's:

extensions.services.openoffice.org/en/project/eurooffice-solver

wiki.services.openoffice.org/wiki/Optimization_Solver

P.

Yes. I already mentioned that OOffice and Gnumeric have rudimentary equivalents to the Solver, but frankly, you should really know how the Solver works for your particular problem and not rely on a 'black-box' solution. The Solver produces its solution by iteration, which is trivial to program, and a worthwhile exercise in itself.

A