Debugging a Basic Program

Breakpoints and Single Step Execution

You can check each line in your Basic program for errors using single step execution. Errors are easily traced since you can immediately see the result of each step. A pointer in the breakpoint column of the Editor indicates the current line. You can also set a breakpoint if you want to force the program to be interrupted at a specific position.

Double-click in the breakpoint column at the left of the Editor window to toggle a breakpoint at the corresponding line. When the program reaches a breakpoint, the program execution is interrupted.

The single step execution using the Single Step icon causes the program to branch into procedures and functions.

The procedure step execution using the Procedure Step icon causes the program to skip over procedures and functions as a single step.

Properties of a Breakpoint

The properties of a breakpoint are available through its context menu by right-clicking the breakpoint in the breakpoint column.

You can activate and deactivate a breakpoint by selecting Active from its context menu. When a breakpoint is deactivated, it does not interrupt the program execution.

Select Properties from the context menu of a breakpoint or select Breakpoints from the context menu of the breakpoint column to call the Breakpoints dialog where you can specify other breakpoint options.

The list displays all breakpoints with the corresponding line number in the source code. You can activate or deactivate a selected breakpoint by checking or clearing the Active box.

The Pass Count specifies the number of times the breakpoint can be passed over before the program is interrupted. If you enter 0 (default setting) the program is always interrupted as soon as a breakpoint is encountered.

Click Delete to remove the breakpoint from the program.

Observing the Value of Variables

You can monitor the values of a variable by adding it to the Watch window. To add a variable to the list of watched variables, type the variable name in the Watch text box and press Enter.

The values of variables are only displayed if they are in scope. Variables that are not defined at the current source code location display ("Out of Scope") instead of a value.

You can also include arrays in the Watch window. If you enter the name of an array variable without an index value in the Watch text box, the content of the entire array is displayed.

Tip Icon

If you rest the mouse over a predefined variable in the Editor at run-time, the content of the variable is displayed in a pop-up box.

The Call Stack Window

Provides an overview of the call hierarchy of procedures and functions. You can determine which procedures and functions called which other procedures and functions at the current point in the source code.

List of Run-Time Errors

කාර්යය කිරිමට අවස‍ර...

2 Syntax error

3 Return without Gosub

තෝරා ඇතුළු කරන්න - අනුගාමී මාර්ගය (Charts)

5 Invalid procedure call

6 Overflow

7 Not enough memory

8 Array already dimensioned

කාර්යය කිරිමට අවස‍ර...

10 Duplicate definition

කාර්යය කිරිමට අවස‍ර...

12 Variable not defined

13 Data type mismatch

14 Invalid parameter

මෙම විධානය පරිශීලනය කිරීමට

20 Resume without error

28 Not enough stack memory

කාර්යය කිරිමට අවස‍ර...

48 Error loading DLL file

49 Wrong DLL call convention

කාර්යය කිරිමට අවස‍ර...

කාර්යය කිරිමට අවස‍ර...

53 File not found

54 Incorrect file mode

ලැයිස්තුව ගොනු - අපනයනය

57 Device I/O error

58 File already exists

59 Incorrect record length

61 Disk or hard drive full

62 Reading exceeds EOF

63 Incorrect record number

67 Too many files

68 Device not available

මෙම විධානය පරිශීලනය කිරීමට

කාර්යය කිරිමට අවස‍ර...

හැඩතල - පෙළ ගැසුම

74 Renaming on different drives impossible

මෙම විධානය පරිශීලනය කිරීමට

76 Path not found

කාර්යය කිරිමට අවස‍ර...

93 Invalid string pattern

මෙවලම් - වර්ග කිරීමතෝරන්න

250 DDE Error

280 Awaiting response to DDE connection

කාර්යය කිරිමට අවස‍ර...

282 No application responded to DDE connect initiation

283 Too many applications responded to DDE connect initiation

කාර්යය කිරිමට අවස‍ර...

285 External application cannot execute DDE operation

286 Timeout while waiting for DDE response

287 user pressed ESCAPE during DDE operation

කාර්යය කිරිමට අවස‍ර...

කාර්යය කිරිමට අවස‍ර...

කාර්යය කිරිමට අවස‍ර...

291 External application has been terminated

292 DDE connection interrupted or modified

293 DDE method invoked with no channel open

294 Invalid DDE link format

295 DDE message has been lost

296 Paste link already performed

297 Link mode cannot be set due to invalid link topic

298 DDE requires the DDEML.DLL file

323 Module cannot be loaded; invalid format

341 Invalid object index

366 Object is not available

380 Incorrect property value

මෙම විධානය පරිශීලනය කිරීමට

394 This property is write-only

420 Invalid object reference

423 Property or method not found

424 Object required

425 Invalid use of an object

430 OLE Automation is not supported by this object

438 This property or method is not supported by the object

කාර්යය කිරිමට අවස‍ර...

445 This action is not supported by given object

446 Named arguments are not supported by given object

447 The current locale setting is not supported by the given object

448 Named argument not found

449 Argument is not optional

450 Invalid number of arguments

451 Object is not a list

කාර්යය කිරිමට අවස‍ර...

කාර්යය කිරිමට අවස‍ර...

කාර්යය කිරිමට අවස‍ර...

951 Unexpected symbol:

952 Expected:

ලැයිස්තුව ගොනු - අපනයනය

ලැයිස්තුව ගොනු - අපනයනය

955 Label expected

956 Value cannot be applied

957 Variable already defined

කාර්යය කිරිමට අවස‍ර...

959 Label already defined

960 Variable not found

961 Array or procedure not found

962 Procedure not found

963 Label undefined

964 Unknown data type

965 Exit expected

කාර්යය කිරිමට අවස‍ර...

කාර්යය කිරිමට අවස‍ර...

968 Symbol already defined differently

969 Parameters do not correspond to procedure

970 Invalid character in number

971 Array must be dimensioned

කාර්යය කිරිමට අවස‍ර...

973 not allowed within a procedure

974 not allowed outside a procedure

කාර්යය කිරිමට අවස‍ර...

976 Unknown option:

977 Constant redefined

නිමැවුම - පිටුවතෝරන්න

මෙවලම් - වර්ග කිරීමතෝරන්න

මෙම විධානය පරිශීලනය කිරීමට

මෙම විධානය පරිශීලනය කිරීමට

1002 Required argument lacking

1003 Invalid number of arguments

1004 Error executing a method

1005 Unable to set property

කාර්යය කිරිමට අවස‍ර...

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