Why won't my command-tab work?

I have a new MacBook Pro. Some of my shortcut keys won't work - like the Command-Tab (switch applications) and the Command-Accent (moving among windows). The Command-A,Z,X,C and V work fine. I've read some aboult plist files in the Library. Can I/Should I delete them all? What will I have to restore (customizations?) if I do? Is there another way to solve this problem? Other Command shortcuts don't work as well.

Hi suzique15,
Welcome to the Apple Support Communities!
There may be a few different troubleshooting steps I would recommend in this situation. Please read over and use the attached article for troubleshooting this situation with your enter key.
One or more keys on the keyboard do not respond - Apple Support
Best regards,
Joe

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Why is my BDC_CURSOR command not working to position the cursor?

Why is my BDC_CURSOR command not working to position the cursor? Here are the details regarding my issue.
I am writing a BDC to mass delete routing material assignments using transaction CA02. I am OK to navigate through the initial screen to go to the Header screen and from here I am OK to navigate to the Material Assignments screen. But once here, I cannot get the BDC_CURSOR command to take me into the list. Here are the commands I am using. Please let me know what I may try differently.
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Thank you for your reply.
I had used SM35 to record. However, I was not aware of the "create program" feature. I had commented out a section from my previous post which I have now added back (latest code below). But it still did not resolve the issue.
When I execute with dismode = 'N', I get back error message "No batch input data for screen SAPLCZDI 1010".
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this code functions to position the desired material to first in screen list
PERFORM bdc_dynpro      USING 'SAPLCZDI' '1010'.
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PERFORM bdc_field       USING 'RC27X-ENTRY_ACT'
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PERFORM bdc_field       USING 'BDC_OKCODE'
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CA02 Material Assignment - Green Check OK
PERFORM bdc_dynpro      USING 'SAPLCZDI' '1010'.
PERFORM bdc_field       USING 'BDC_CURSOR'
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HI, Mark,
markjames9 wrote:
I want to exclude records based on two criteria's: status = 'M' and the status reason = 52.
The table contains records with status = 'M' and status reason other than 52.
Also the table contains records with status other than 'M' and status reason = 52 and I want to include those records.
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I’m curious why the first statement didn’t work?
Can anyone explain why the first query didn't combine the 2 statements but a Where Not did?
Thank you - Mark
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Hi suzique15,
Welcome to the Apple Support Communities!
There may be a few different troubleshooting steps I would recommend in this situation. Please read over and use the attached article for troubleshooting this situation with your enter key.
One or more keys on the keyboard do not respond - Apple Support
Best regards,
Joe

Why won't my command-tab work?

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