Hi, I have read through other posts, but still can't solve why I can't get Bob Larson's tool to work 
I have opened the tool. I have specified the 3 locations -
1) My existing front-end master which is a .mbd file here :
S:\PIT1\Reports & Data\Database\Database Development\Front End Master Copy For Developments\DatabasePIT.mdb
2) My back-end which is here:
S:\PIT1\Reports & Data\Database\Database Master Copy\DatabasePIT_be.mdb
3) My proposed location for the new mde file:
S:\PIT1\Reports & Data\Database\Database Development\MDE Master
Next I select "Enable Auto-Updating" button and get the message displayed as per the instructions. Then I copy the code for the form.
When I try to open my front-end master to put the code into the form, I get an error message saying "Error- accessing file. Network connection may have been lost."
The back-end opens ok and there is the table called "tbl-version_fe_master".
I have replaced my master front-end now with a good saved copy. What should I try next? I have tried linking the table in the back-end to the new good copy of the front-end, so the front and back look the same, (tables names the same), however the same problem occurs when I run the updater again despite doing this bit manually.
Any ideas? I am a self-taught user of access with limited knowledge of VBA.
Thanks
Sam

I have opened the tool. I have specified the 3 locations -
1) My existing front-end master which is a .mbd file here :
S:\PIT1\Reports & Data\Database\Database Development\Front End Master Copy For Developments\DatabasePIT.mdb
2) My back-end which is here:
S:\PIT1\Reports & Data\Database\Database Master Copy\DatabasePIT_be.mdb
3) My proposed location for the new mde file:
S:\PIT1\Reports & Data\Database\Database Development\MDE Master
Next I select "Enable Auto-Updating" button and get the message displayed as per the instructions. Then I copy the code for the form.
When I try to open my front-end master to put the code into the form, I get an error message saying "Error- accessing file. Network connection may have been lost."
The back-end opens ok and there is the table called "tbl-version_fe_master".
I have replaced my master front-end now with a good saved copy. What should I try next? I have tried linking the table in the back-end to the new good copy of the front-end, so the front and back look the same, (tables names the same), however the same problem occurs when I run the updater again despite doing this bit manually.
Any ideas? I am a self-taught user of access with limited knowledge of VBA.
Thanks
Sam