FileMaker Go - Filename with + sign not opening via URL

Issue report by stevej

Product

FileMaker Go

Version

13.0.2

Operating system version

iOS 7.0.6

Description of the issue

I have a database that has a plus (+) sign in the file name. I've used the FileMaker Inc App Maker 1.04 to create a iOS Configuration Profile and have installed that on my iPhone.

The database name is: A+Z.fmp12

When I tap the home screen icon that was saved with the correct icon and name (A+Z) it launches FileMaker Go but then fails to open the database, even though I can see it in the list of devices. It fails with this error: "The file "A Z.fmp12" could not be opened (Not Found)"

It looks like some issue with the URL encoding/decoding as it's looking for database named "A Z.fmp12" when it should be looking for a database named "A+Z.fmp12".

I checked the URL that was generated by the App Maker database and in the A+Z.mobileconfig file I can see using a text editor this string:

<string>javascript:window.location='FMP://%7E/A%2BZ'</string>

That URL looks correct to me as it has correctly encoded the + sign as %2B.

Steps to reproduce the problem

1. create a database named "A+Z.fmp12"
2. copy to iOS device
3. create iOS Configuration Profile for this database using the FileMaker Inc App Maker
4. send profile to device and install on device
5. tap home screen icon that was generated

Expected result

FileMaker Go launches and opens the A+Z.fmp12 database

Actual result

FileMaker Go launches but cannot open the A+Z.fmp12 database. Error is:

"The file "A Z.fmp12" could not be opened (Not Found)"

(see screenshot below)

Exact text of any error message(s) that appear

"The file "A Z.fmp12" could not be opened (Not Found)"

(see screenshot below)

Screenshot