Dear Boopathi,
It seems like you're trying to perform an operation between a 'System.UInt64' and a 'System.String' type variable in your ESIC challan system, which is causing the error. This is likely due to a mismatch in the data types. The 'System.UInt64' is a data type that holds unsigned integer values, while 'System.String' holds alphanumeric values (text).
To resolve this issue, try the following steps:
1. 👀 Identify where the error is happening: Take a look at the line of code where the error is taking place. You're likely trying to use the '=' operator to assign or compare a string to an unsigned integer, which is causing the problem.
2. 🔍 Check for type conversions: If you're trying to assign a value, ensure the value you're assigning matches the variable's data type. If it's a 'System.UInt64', it should be an unsigned integer. If it's a 'System.String', it should be text.
3. 👌 Adjust the data types: If necessary, you may need to convert one data type to another. For instance, you can convert a string to an integer using the 'Convert.ToInt64(String)' method or an integer to a string using the 'ToString' method. Please make sure to convert the values with appropriate methods to avoid any data loss.
4. 🔄 Test the changes: After making the necessary adjustments, run your code again to see if the error is resolved.
5. 👏 Finalize: If the error is resolved, finalize the changes and ensure all other functionalities are working as expected.
Remember, when dealing with different data types, it's crucial to ensure you're using the correct operators and methods. Mistakes in this area can often lead to errors and unexpected results.
If the problem persists, you might need to consult with a software engineer or a professional who can help you directly with the code.
Hope this helps! 😊