Parameter is missing a value ssrs 2008

Question

I have a parameter of integer datatype which is hidden. When i run the report, report gives me an error

Parameter X is missing a value

Answer 1

I had a similar issue where the default value as set by SSRS is (Null), I didn't need the parameter for my report however; I found it useful for testing to filter down the list so I kept it, I guess I could have deleted it in SSRS on the dataset config. but I changed it to =System.DBNull.Value (I guess this could be any expression) instead and that worked for me, so then I can still pass in a value if need be and also set Available values (had to make sure a NULL value was added to my dataset) if I then decide to unhide at a later date.

Answer 2

I want to add to dmbreth's CORRECT answer.

I was missing the concept that the value of the parameter still needed to be tied to something. Originally, I was tying the output of a dataset by using the Available values portion of the parameter properties, but according to dmbreth's answer, that could not be the case. Finally I moved my output dependence settings from the Available Values section to the Default Values section and that did the trick.

So, in summary, in the parameter properties dialogue:

General Page - Allow multiple values checked(this option is specific to my application), parameter visibility set to internal

Available Values Page - None

Default Values Page - Get values from query, [appropriate dataset, value here]

Advanced Page - No significance here

Hopefully, that is clear enough to benefit someone else with the same problem...

Answer 3

I had to do an "if exists" statement for this to go away. It worked for me because it makes it always return a value even if that value is not need by my query.

    if exists (my select query)
    my select query
    else 
    select '2' 
    // '2' would never be used, but it made ssrs stop giving me
    // the stupid error and execute the rest of the query

Answer 4

First of all,

Check that parameter's - Available Values by going to report parameters properties.

It must not be specified any values. So we should set it as None

Second work around is,

Just add a blank space at Specify values - in Default values inside report parameters properties.

This will surely work. Hope it will save your time.

Answer 5

Make sure that you have not specified Available Values for the parameter. Available Values should be "None" for internal and hidden parameters.

Answer 6

The problem occurs also, if you have a parameter that depends of another one without "default value" inside the Dataset Query and does not admit null value.

For example:

Parameter 1 have a default value: NameEmployee from the dataset "EmployeeSearch"

But the dataset "EmployeeSearch" have a filter or a parameter inside the query named @Month that indicate the number of the month. So if the value of @Month is null, SSRS will say "Parameter is missing a value".