Visual LISP, AutoLISP and General Customization

[#1]

I am trying to create a line between two defined points but get the following error

; error: An error has occurred inside the *error* function AutoCAD variable  setting rejected: "DYNMODE" nil

I have googeld it but can’t find anything on it. Just as some background information I didn’t use DYNAMODE or any error function, which has me a bit baffled then

Anyways here's the troubled code snippet.

(command "line" MYPOINT (strcat MYDIST ,0 ,0))

Also tried

(command "line" MYPOINT MYPOINT2)

Doesn’t do anything either…

[#2]

---

The_Caddie wrote:

I am trying to create a line between two defined points but get the following error

; error: An error has occurred inside the *error* function AutoCAD variable  setting rejected: "DYNMODE" nil

... here's the troubled code snippet.

(command "line" MYPOINT (strcat MYDIST ,0 ,0))

Also tried

(command "line" MYPOINT MYPOINT2)

.…

---

I couldn't say about DYNMODE without seeing the whole routine, but as for the (command) functions:

The first one, assuming MYDIST is a distance [real number] in the X direction othat you want to go from MYPOINT, should be either

(command "line" MYPOINT (strcat "@" (rtos MYDIST) ",0,0") "")

or

(command "line" MYPOINT (polar MYPOINT 0 MYDIST) "")

or there are a few other ways it could be done.

The second one also needs a "" [Enter] at the end to complete the Line command.

[#3]

The cursor places the line but keeps on holding on to its endpoint and wont place that. Though the error has now changed to ; error bad argument type: numberp: nil

EDIT:

a better way to tackle this is perhaps to show me how I can place a line using two variables set to coordinate values found in model space.

After all the problem is how do I use variables to place a line.

(sorry my fault, complicated explanations) 

[#4 · Accepted solution]

---

The_Caddie wrote:

The cursor places the line but keeps on holding on to its endpoint and wont place that. though the error has now changed to ; error bad argument type: numberp: nil

---

That means some AutoLISP function that is expecting a number is being given nil instead.  The most likely reason for that is that the MYDIST variable does not have a value set into it, which is causing trouble for (rtos) and (polar).

[#5]

yeah oops mabey if i spelled the two instances of the MYDIST and MYDIST1 variables equally the problem would go away (red faced)

[#6]

---

The_Caddie wrote:

... how I can place a line using two variables set to coordinate values ....

---

It appears from further messages that you've got it working, but in answer to the above:  The last line of code in your original post, with "" [Enter] added at the end to complete the Line command, would be the usual way.

[#7]

Yes that worked with the enter...