Object no longer valid

Hi,

This is the error i receive when i am using collections. I am adding numeric value with string value as the key in collection. Now when i retrieve these values i receive this error.

Now i worked lot on this and finally i was able to solve the probs by concatenating the value with & "" but i'm not able to find the logic behind it.

If anybody has any idea.

Thanks.

Well I dunno if this is relevant, but you cannot use an entirely numeric value as a key. I think it either must have a string part, or have a string part prefixed.

ya thats fine numeric vals can't be used as key and in my case i am using string value as key.

Show us some code, and you could properly get alot more help

'Initializing collection
Set mcolVAS = New Collection

'Adding items in collections based on recordset
'vms_id is NUMERIC & vms_name is STRING

Do While Not lrsVAS.EOF
mcolVAS.Add lrsVAS!vms_id , UCase(lrsVAS!vms_name)
lrsVAS.MoveNext
Loop
Set lrsVAS = Nothing

'Reading from collection
lstrValues = mcolVAS.Item(rsOriginalData!MVS_SERVICE) & ","

Here it gives error, OBJECT NO LONGER VALID.

Now if i change upper line as
mcolVAS.Add CStr(lrsVAS!vms_id & "") , UCase(lrsVAS!vms_name)

It runs perfect.


Thanks.

Could you please test this, and see if it does the trick (that is work!)

VB Code:

Do While Not lrsVAS.EOF 
mcolVAS.Add CLng(lrsVAS!vms_id) , UCase(lrsVAS!vms_name) 
lrsVAS.MoveNext 
Loop 
Set lrsVAS = Nothing

And let me know.

Ya, its working with CLng also. Cud u explain me the reason/logic?

Thanks.

OK here goes.

The reason for your error was, that you didn't add a number ans the id for the element in the collection but rahter a reference to a class.

This is so because lrsVAS!vms_id doesn't really return a number (ie. a long) but rather a class (a reference).

When you close your DB connection and next on set the object to nothing, the reference actuallky point to Nothing, and hence you get your error.

When you include the clng() function or your "" in the end, to transform the reference to the a value that is either a long or a string.

I hope this sort of cleared things up a bit.

Thanks buddy. That was good enough.