A Practical Introduction to ABAP

[Former Member]

I hope this is the correct forum for my question.

I am using the book, ABAP Objects, by Keller and Krueger, 2nd edition, 2007. In chapter 2, "A Practical Introduction to ABAP", there is an example of a car rental application. I am trying very carefully to follow the instructions to enter this application, and I have hit a problem.

I am following the instructions exactly, with this change: whereever a table name, function group, function module, etc is named "Z_", I am using "Y_" instead.

The reason I am doing this: the minisap I am using has the full text of all the example programs in the book, all with the "Z_" names. I wanted to enter everything myself, and the text of the book tells me that "Y_" is acceptable for user-names. Also, this allows me to compare the code I enter to the code that comes with the minisap to see what I might have done wrong.

I am trying to create the Y_CAR_RENTAL_SCREENS Function Group. At the bottom of Page 103, I am instructed to manage the text symbols in the TOP include program. The symbols are 'text-cid' and 'text-rsv'.

By clicking the 'cid', I can enter the Text Symbols for 'cid' and 'rsv' as instructed. On the top of page 104, it says: "If you want, you can also switch to the Selection text tab to create meaningful names for the input fields of the selection screens." This is my first problem. I can switch to that tab, but it is NOT modifiable.

I can open a second session and open the "Z_CAR_RENTAL_SCREENS function group, and I can see that there are 4 entries there, for CATEGORY, DAY_FROM, DAY_TO and ID.

How do I enter these items?

Since I cannot enter these Selection Texts, I follow the instructions to save and activate the text symbols. The next step (page 105) is to create the Function Module for Y_INPUT_CUSTOMER. I enter the information ofr the CUSTOMER_ID under the 'Export' tab, and the code indicated under the 'Source Code' tab. The last sentence on page 105 says: "Now activate the function module."

This is Ctrl-F3, or the 'Activate' icon, or under the 'Function Module' dropdown list at the top of the screen, choose 'Activate'. I try any of these and it brings up a screen of Inactive Obects for BCUSER. I press the green check box, and it tells me there are syntax errors. If I choose 'Process Error', it tells me the error is Field "ID" is unknown. It is neither in one of the specified tables nor defined by a "DATA" statement.

What do I need to do to be able to continue?

[Former Member]

This question is seven years old (today 2015), but I had nearly the same problem with the book and the error message at z_input customer:
"Field "ID" is unknown.  It is neither in one of the specified tables nor defined by a "DATA" statement."
- and solved it. So maybe, somebody else will have the same error message, so he could use my solution:

I forgot to activate the function: "z_car_rental_screens". There is a line with "PARAMETERS id TYPE zcustomers-id."

The explanation: Without the activation SAP don't know this parameter id!

After activation the error with field id is unknown went away.

You realise the unactivated things in your repository browser as blue lines.

blue = unactivated

black = activated

[marcelo_ramos]

James,

Place here your source code, maybe we can help you !

Greetings.

Marcelo Ramos