Summary
After an Update to Spider LCM 6.3.4 you cannot start up the Spider application but get an unhandled exception.
Symptoms
After an Update to Spider LCM 6.3.4 you cannot start up the Spider application but get an unhandled exception:
Server Error in '/Spider' Application. Input String was not in a correct format.

Cause
The problem lies in a missing registry key during the setup leading into one configuration entry being empty (nut NULL)
Resolution
To solve this problem follow these steps:
Method 1:
- Open the Spider Admin tool
- Navigate to Spider Core > Config > Application > Indexing
- You will see that the ApiPort has an empty value. Set it to 80

Ignore the FormatException message
Method 2:
- Open Microsoft SQL Management Studio
- Navigate to the Spider Core database
- Open the Config table for editing
- Change the value of the Key ApiPort in the Area Application.Indexing to 80

Additional Information
If you think you ran in a similar cause (string conversion error) but this is not the config key that causes the problem, run the following SQL statement to get all integer configuration values that are not numeric:
SELECT [Area],[Key],[Value] FROM [SpiderCore63].[dbo].[Config] WHERE CLRType = 'System.Int32' AND ISNUMERIC([Value])=0
Products
LCM6
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Case id: 00001065
Activity: Status change: 2 hours ago