This kind of error will occur in crystal report when you export the report to any other format. For example from “.rpt” to “.pdf” /”.doc” like that. The error message will be like this

Problem:

Invalid export DLL or Export Format

Cause /Reason:
The problem is in the export dll used in the crystal report.. since its not properly registered this problem will occur

Solution:
Uninstall the acrobat reader and reinstall it this problem will be solved

Some time we may face the Error While we load the Crystal report in the application . the error message which we will face is

Problem:
Error : Load Report failed

Cause /Reason:
When the report file (.rpt file) is not in the Specific path which you had mention in the application this error will occur

Solution:
Place the specific .rpt file in the path specified.

Regional Settings for IIS

Some time we may get problem in language or the numeric/ date time format while you deployed an asp.net application or in the development itself.

Problem:
The problem is in the date time format that your system displays. Actually the date should be in “dd/MM/yyyy” format but it displays as “dd-MM-yyyy” or some other format. Even though you try by setting the regional setting also its wont work. But the same application works in another server / PC with “dd/MM/yyyy” format and the month name is also displaying in Different language .

Cause:

In the Globalization attribute in the machine.config file if the culture if not set this problem arise. You can find the configuration file in “C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\CONFIG” this location

Solution:

Give the culture name the Globalization attribute


So the asp.net application will take the regional settings from the machine.Config file. Here I had set to US English you can set to any other language format if you need.

Note: This setting is for all the application deployed in that IIS Server

Weather Microsoft is watching your system. Don’t they have any other work than that. “wpa.dbl “.WPA stands for Windows Product Activation for Windows XP and above version of Microsoft OS is using the wpa.dbl file to activate the product. There are lot of rumours that, by using this file Microsoft is going to watch your activities. Ya its may be true but not all your personal activities ,it will check for the OS license only . Ok how MS is going to check the license, weather they are going to take my H/W info. Yes they are, there are few listed H/W which they are going to check they are

NIC & MAC address
HDD Serial Number
processor number
Display Adapter
SCSI Adapter
IDE Adapter (effectively the motherboard)
RAM Amount Range (i.e., 0-64mb, 64-128mb, etc.)
Processor Type
CD-ROM / CD-RW / DVD-ROM

The “wpa.dbl “ is going to have the info of the above said H/W. Then What its does? Every time you boot you system the OS will check the H/W serial number with the number in the “wpa.dbl “ file, if your version of OS pass 7 checks then only your OS will be considered as licensed one. If else you can all MS through phone and you can activate it

What happen when I change the H/W?
If you change 1 or 2 H/W there is no problem if the OS passes less then 7 checks then you want to reactivate your OS through phone call. So this what “wpa.dbl “file is going to do in your system