USEION variable can not be initialized in a CONSTANT block. (#1)

* USEION variable can not be initialized in a CONSTANT block. See neuronsimulator/nrn#1955. * cdp5.mod --------- Co-authored-by: Alexandru Săvulescu <alexandru.savulescu@epfl.ch>
ModelDBRepository · Jan 30, 2023 · 3548e45 · 3548e45
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diff --git a/ReadMe.htm b/ReadMe.htm
@@ -107,3 +107,8 @@
 analysis of dendritic Ca2+ kinetics in rodent Purkinje cells: role of
 parvalbumin and calbindin D28k. J Physiol 551:13-32
 
+ <b>Changelog</b>
+
+ cdp3.mod and cdp5.mod are updated due to issue mentioned in https://github.com/neuronsimulator/nrn/pull/1955.
+ CONSTANT block has no effect in the initialization of ion variables.
+
diff --git a/cdp3.mod b/cdp3.mod
@@ -95,6 +95,7 @@ ASSIGNED {
 :	ica_pmp_last   (mA/cm2)
 	parea     (um)     : pump area per unit length
 	cai       (mM)
+	cao       (mM)
 	mgi	(mM)	
 	vrat[Nannuli]  (1) : dimensionless
                      : numeric value of vrat[i] equals the volume 
@@ -103,7 +104,7 @@ ASSIGNED {
 
 }
 
-CONSTANT { cao = 2	(mM) }
+: CONSTANT { cao = 2	(mM) }
 
 STATE {
 	: ca[0] is equivalent to cai

diff --git a/cdp5.mod b/cdp5.mod
@@ -97,11 +97,12 @@ ASSIGNED {
 	parea     (um)     : pump area per unit length
 	parea2	  (um)
 	cai       (mM)
+	cao       (mM)
 	mgi	(mM)
 	vrat	(1)	
 }
 
-CONSTANT { cao = 2	(mM) }
+: CONSTANT { cao = 2	(mM) }
 
 STATE {
 	: ca[0] is equivalent to cai