Hi Len,

Long term, please go with FileMaker server, for all of the reasons 
already listed. Ok that out of the way, I would suspect a hardware or 
cable issue.

If you can take a look at the router logs to see if it shows loss of 
connection to one of your computers. You would see indications that it 
is frequently assigning an address to one of them.

If there has been any work done in the office lately that might have 
come into contact with one of your network cables. If you have access to 
the cables, look for kinks or cuts in the outer casing.

Check the connectors on the cables. If the little tab that holds the 
connector in has broken off replace the cable.

Last make sure the cables are plugged in all the way. I have seen were 
the computer was moved and the cable was no longer properly seated.

 From here it gets a bit more expensive....

It is possible that the network card is going bad in one of the 
computers. These days the cards are frequently built in to the mother 
board. That stated, you should be able to get one that plugs in to the 
mother board. Get one and install it in one of the computers. If the you 
loose connection again, swap it to the other computer. If one of the 
Network adapters is bad, this will resolve the problem and let you know 
which one.

If your switches are 10 years old, consider getting new ones. I had a 
similar issue a number of years ago when setting up a new office for the 
company I worked for. In this case it was a large switch. Everything 
would work great for 10 minutes to an hour. Then one or more computers 
would show network errors and close all external connections. Reboot the 
computer it would get a new address and be fine until the next glitch. 
Finally tracked it down to this one switch. The catch... we had several 
hundred computers and several switches. It took a while to find the 
right one.

Hope this is helpful.
Best of luck.
Bruce Herbach
Herbach Consulting
FileMaker 9,10,11 Certified Developer

On 8/19/11 5:58 AM, Leonard Siskin, DC wrote:
>
> I have been an amateur Filemaker user for years and run my 
> chiropractic office on a database I built starting in FM5.
>
> I am using 2 computers, one opens the file using FM11 and one opens it 
> remotely FM 10.
>
> The system always worked flawlessly but recently the network loses 
> communication with the host spontaneously and I have to re-open the 
> database from the remote location.
>
> I’ve checked my security software and replaced my router and all three 
> switches the office uses but the problem still exists.
>
> Sometimes connectivity is lost every few minutes and after several 
> times re-opening the database from the remote computer it will say not 
> enough memory to open the database (I am using a core i7 processor, 
> windows 7 professional and one of the two has 12GB ram and the other, 
> 18GB). Sometimes I receive an error message stating the maximum number 
> of licensed users are already using the software and it shuts 
> filemaker down on the remote computer. (Both computers have licensed 
> software) The only way to re-open the database on the remote computer 
> is to shut down filemaker on both computers and reopen the database 
> then re-open from the remote location.
>
> Does anyone have any idea why this is happening or how to fix it????
>
> I really appreciate the input from the group as many of the 
> conversations here have shed light on using the system better.
>
> I’d appreciate any feedback anyone has.
>
> Thanks.
>
> Len
>
> Leonard Siskin, DC
>
> */Siskin Family Chiropractic/*
>
> 326 US Highway 22
>
> Suite 6B
>
> Green Brook, NJ 08812
>
> *www.SiskinChiropractic.com*
>
> [log in to unmask]
>
> *Phone:* 732-752-6606
>
> Fax: 732-752-6643
>