diff --git a/.github/workflows/ci-scripts-build.yml b/.github/workflows/ci-scripts-build.yml
index a2056aa..6e8aa85 100644
--- a/.github/workflows/ci-scripts-build.yml
+++ b/.github/workflows/ci-scripts-build.yml
@@ -1,7 +1,7 @@
 name: pyDevSup
 
 # Trigger on pushes and PRs to any branch
-on: [push, pull_request]
+on: [push, pull_request, workflow_dispatch]
 
 env:
     SETUP_PATH: .ci-local:.ci
@@ -159,6 +159,7 @@ jobs:
             python: "3.7"
             container: "python:3.7"
             profile: deb10
+            test: # no - RuntimeError: Requires Base >=3.15 for iocBuildIsolated()
 
           - os: windows-latest
             cmp: vs2026
diff --git a/devsupApp/src/dbfield.c b/devsupApp/src/dbfield.c
index f2fc1f9..90d5be8 100644
--- a/devsupApp/src/dbfield.c
+++ b/devsupApp/src/dbfield.c
@@ -3,7 +3,6 @@
 #undef _POSIX_C_SOURCE
 #undef _XOPEN_SOURCE
 
-#include <Python.h>
 #ifdef HAVE_NUMPY
 #include <numpy/ndarrayobject.h>
 #endif
@@ -117,9 +116,9 @@ static int assign_array(DBADDR *paddr, PyObject *arr)
 {
 #ifdef HAVE_NUMPY
     void *rawfield = paddr->pfield;
-    rset *prset;
-    PyObject *aval;
-    PyArrayObject *array = (PyArrayObject *)arr;
+    rset *prset = NULL;
+    PyArrayObject *aval = NULL;
+    PyArrayObject * array = (PyArrayObject *)arr;
     unsigned elemsize = dbValueSize(paddr->field_type);
     unsigned long maxlen = paddr->no_elements, insize;
     PyArray_Descr *desc = dbf2np[paddr->field_type];
@@ -139,18 +138,20 @@ static int assign_array(DBADDR *paddr, PyObject *arr)
 
     insize = PyArray_DIM(array, 0);
 
-    if(paddr->special==SPC_DBADDR &&
-       (prset=dbGetRset(paddr)) &&
-       prset->get_array_info)
+    if(paddr->special==SPC_DBADDR)
     {
-        /* array */
-        char *datasave=paddr->pfield;
-        long noe, off;
-        if(prset->get_array_info(paddr, &noe, &off)) {
-            PyErr_Format(PyExc_ValueError, "Error fetching array info for %s.%s",
-                     paddr->precord->name,
-                     paddr->pfldDes->name);
-            return 1;
+        prset = dbGetRset(paddr);
+        void *datasave=paddr->pfield;
+        if (prset && prset->get_array_info)
+        {
+            /* array */
+            long noe, off;
+            if(prset->get_array_info(paddr, &noe, &off)) {
+                PyErr_Format(PyExc_ValueError, "Error fetching array info for %s.%s",
+                        paddr->precord->name,
+                        paddr->pfldDes->name);
+                return 1;
+            }
         }
 
         rawfield = paddr->pfield;
@@ -159,28 +160,27 @@ static int assign_array(DBADDR *paddr, PyObject *arr)
     }
 
     Py_XINCREF(desc);
-    if(!(aval = PyArray_FromAny(arr, desc, 1, 2, NPY_ARRAY_C_CONTIGUOUS | NPY_ARRAY_ALIGNED | NPY_ARRAY_WRITEABLE, arr)))
+    if(!(aval = (PyArrayObject *)PyArray_FromAny(arr, desc, 1, 2, NPY_ARRAY_C_CONTIGUOUS | NPY_ARRAY_ALIGNED | NPY_ARRAY_WRITEABLE, arr)))
         return 1;
 
-    if(elemsize!=PyArray_ITEMSIZE((PyArrayObject *)aval)) {
+    if(elemsize!=PyArray_ITEMSIZE(aval)) {
         PyErr_Format(PyExc_AssertionError, "item size mismatch %u %u",
-                     elemsize, (unsigned)PyArray_ITEMSIZE((PyArrayObject *)aval));
+                     elemsize, (unsigned)PyArray_ITEMSIZE(aval) );
         Py_DECREF(aval);
         return 1;
     }
 
-    memcpy(rawfield, PyArray_GETPTR1((PyArrayObject *)aval, 0), insize*elemsize);
+    memcpy(rawfield, PyArray_GETPTR1(aval, 0), insize*elemsize);
 
     Py_DECREF(aval);
 
-    if(paddr->special==SPC_DBADDR &&
-       (prset=dbGetRset(paddr)) &&
-       prset->get_array_info)
+    if(prset)
     {
-        if(prset->put_array_info(paddr, insize)) {
-            PyErr_Format(PyExc_ValueError, "Error setting array info for %s.%s",
-                         paddr->precord->name,
-                         paddr->pfldDes->name);
+        if (prset->put_array_info)
+            if(prset->put_array_info(paddr, insize)) {
+                PyErr_Format(PyExc_ValueError, "Error setting array info for %s.%s",
+                            paddr->precord->name,
+                            paddr->pfldDes->name);
             return 1;
         }
     }
diff --git a/devsupApp/src/devsup/disect.py b/devsupApp/src/devsup/disect.py
index d166f74..b826361 100644
--- a/devsupApp/src/devsup/disect.py
+++ b/devsupApp/src/devsup/disect.py
@@ -4,6 +4,7 @@
 
 import sys, gc, inspect, time
 try:
+    InstanceType = None
     from types import InstanceType
 except ImportError:
     pass # py3
diff --git a/documentation/index.rst b/documentation/index.rst
index e3a86d1..fd5ad57 100644
--- a/documentation/index.rst
+++ b/documentation/index.rst
@@ -11,9 +11,18 @@ pydevsup documentation
 It currently supports EPICS >=3.14.12 and python versions >=3.6
 The numpy package is also required.
 
-The source can be found at http://github.com/mdavidsaver/pyDevSup
-
-File releases are available at https://github.com/mdavidsaver/pyDevSup/releases
+It is not possible to use the module with a static build configuration.
+The code will build, but it will not work.
+The reason is that EPICS database defintions are created in two modules:
+1. The _dbapi module creates the defintion of 'Python Device'.
+2. The softIocPy module implements device types such as longin that use 'Python Device'.
+   In a static build, these are held in seperate EPICS databases.
+   Consequently the softIocPy module does not know what a 'Python Device' is.
+   In a shared library build there is ony one database, held by the underlying EPICS base library.
+
+The source can be found at http://github.com/epics-modules/pyDevSup
+
+File releases are available at https://github.com/epics-modules/pyDevSup/releases
 
 Contents:
 
diff --git a/pyIocApp/setup.c b/pyIocApp/setup.c
index 0e75d51..abe8689 100644
--- a/pyIocApp/setup.c
+++ b/pyIocApp/setup.c
@@ -134,7 +134,10 @@ static void cleanupPrep(initHookState state)
 static void pySetupReg(void)
 {
     Py_InitializeEx(0);
+#if PY_VERSION_HEX < 0x03070000
+    /* See https://docs.python.org/3/c-api/threads.html#c.PyEval_InitThreads */
     PyEval_InitThreads();
+#endif
 
     setupPyPath();
 
diff --git a/requirements-deb10.txt b/requirements-deb10.txt
index 91aeff2..039a17d 100644
--- a/requirements-deb10.txt
+++ b/requirements-deb10.txt
@@ -1,3 +1,2 @@
 numpy==1.16.2
-#nose==1.3.7
 nose2