First most recommended action is to use some JSON format Validator - i.e.-
http://jsonlint.com/
http://jsonlint.com/
After getting the results as "Valid JSON", put back the JSON request into loadrunner vugen script or any other scripting tool you are using for performance testing.
Most common errors are syntax errors -
- missing opening or closing brackets ( { [ ] } )
- missing opening or closing quotes " ' ' "
- keywords in capital letters, instead of NULL use null, false not FALSE, true not TRUE (special care required when such values are parameterized using excel, csv, or any other format (i.e. Tab delimited txt). Excel converts the small char to all caps for such keywords. (you type all small, but excel returns all capital, very irritating behavior)
Right click the Cell in excel and select "Format Cell..." option -
Most common errors are syntax errors -
- missing opening or closing brackets ( { [ ] } )
- missing opening or closing quotes " ' ' "
- keywords in capital letters, instead of NULL use null, false not FALSE, true not TRUE (special care required when such values are parameterized using excel, csv, or any other format (i.e. Tab delimited txt). Excel converts the small char to all caps for such keywords. (you type all small, but excel returns all capital, very irritating behavior)
Right click the Cell in excel and select "Format Cell..." option -
Change the category from "General" to "Text" -
Verify that the default category selected is "General".
Now overwrite the cell with all small characters i.e. false