How to Enable Development Errors in CRM?

Steps those are required are given in bellow-
CRM by default tends to throw a General error for any error that occurs.
If you need to have a more specific error, enable DevErrors in Web.config. To do it do the following:

Step 1: Goto the CRM Web Server to the Web Installation path.
Step 2: Open the Web.config file
Step 3: Change the value of DevErrors Key to 'On'
Step 4: Save the Web.config file.
Now CRM should show up more specific errors.

How to enable scheduled tracing
1. Set up the trace. When you set up the trace, enter all the required values. However, leave the TraceEnabled registry entry set to 0.

2. Create a registry file that enables the trace. To do this, start Notepad, copy the following information to the document in Notepad, and then save the document as a .reg file:
Windows Registry Editor Version 5.00 HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSCRM] “TraceEnabled”=dword:00000001

3. Create a batch file that calls the .reg file. To do this, open a new document in Notepad, and then copy the following lines to the document in Notepad.

Note- In the lines that you copy, replace the placeholder with the path and the file name of the actual .reg file that you created in step 2.
@echo off
regedit /s ""
exit

4. In Control Panel, add a new scheduled task that runs the new batch file that you created in step 3. Schedule the task for the time at which you want the trace to run.

====================================================================================

How to disable scheduled tracing
1. Create a registry file that disables the trace. To do this, start Notepad, copy the following information to the document in Notepad, and then save the document as a .reg file:
Windows Registry Editor Version 5.00 HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSCRM] “TraceEnabled”=dword:00000000 "TraceRefresh"=dword:00000003
Note You must change the value of the TraceRefresh registry entry. If you do not change the value of the TraceRefresh registry entry, the trace will not be disabled.

2. Create a batch file that calls the .reg file. To do this, open a new document in Notepad, and then copy the following lines to the document in Notepad.

Note- In the lines that you copy, replace the placeholder with the path and the file name of the actual .reg file that you created in step 2.
@echo off
regedit /s ""
exit

3. In Control Panel, add a new scheduled task that runs the new batch file that you created in step 3. Schedule the task for the time at which you want the trace to be disabled.

for more details please use the bellow link-
Enable trace in CRM