# Beginner's problem with making a map

**URL:** <https://forum.generic-mapping-tools.org/t/beginners-problem-with-making-a-map/4192>\
**Category:** Q&A\
**Created:** [August 19, 2023, 8:38am UTC](https://forum.generic-mapping-tools.org/t/beginners-problem-with-making-a-map/4192 "2023-08-19T08:38:26Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ADEDEWE](https://yyz1.discourse-cdn.com/flex047/user_avatar/forum.generic-mapping-tools.org/adedewe/32/3294_2.png) [@ADEDEWE](https://forum.generic-mapping-tools.org/u/ADEDEWE)\
**Post date:** [August 19, 2023, 8:38am UTC](https://forum.generic-mapping-tools.org/t/beginners-problem-with-making-a-map/4192/1 "2023-08-19T08:38:26Z")

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I couldn’t successfully run this command on my terminal " pscoast -R0/360/-70/70 -Jm1.2e-2i -Ba60f30/a30f15 -Dc -G240 -W1/0 -P \> GMT\_mercator.ps". All i get is this error code “$ pscoast -R0/360/-70/70 -Jm1.2e-2i -Ba60f30/a30f15  
-Dc -G240 -W1/0 -P \> GMT\_mercator.ps  
pscoast [ERROR]: Must specify at least one of -C, -G, -S, -E, -I, -N, -Q and -W  
-bash: -Dc: command not found”. I need help

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**Author:** ![pwessel](https://yyz1.discourse-cdn.com/flex047/user_avatar/forum.generic-mapping-tools.org/pwessel/32/30_2.png) [@pwessel](https://forum.generic-mapping-tools.org/u/pwessel)\
**Post date:** [August 19, 2023, 8:59am UTC](https://forum.generic-mapping-tools.org/t/beginners-problem-with-making-a-map/4192/2 "2023-08-19T08:59:03Z")

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Has to be one line, not spit over two. That is why it tries to run "-Dc … as a separate command which is of course not found.  
If you are a beginner, why are you using GMT classic mode? Lots easier with modern mode.